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How long is 456.8 meters?

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It's about one-and-one-tenth times as tall as The Petronas Twin Towers.
In other words, 456.8 meters is 1.011 times the height of The Petronas Twin Towers, and the height of The Petronas Twin Towers is 0.9891 times that amount.
(a.k.a. Menara Berkembar Petronas, a.k.a. Petronas Towers) (Kuala Lumpur, Malaysia) (to spire)
Each of the Petronas Towers stands 451.9 m to their spires. Holding the record as the tallest buildings in the world from 1998 to 2004, the towers continue to hold the record for the deepest foundation barrettes — up to 115 m deep.
It's about nine-tenths as tall as The Shanghai World Financial Center.
In other words, 456.8 meters is 0.928 times the height of The Shanghai World Financial Center, and the height of The Shanghai World Financial Center is 1.08 times that amount.
(上海环球金融中 上海環球金融中心, Shànghǎi huánqiú jīnróng zhōngxīn) (a.k.a. SWFC) (Shanghai, China) (to spire)
The Shanghai World Financial Center is 492 m tall to its roof. It is home to both the world's highest hotel (on its 79th through 93rd floors) and the world's tallest observation deck (on its 100th floor, approximately 474 m above ground).
It's about nine-tenths as tall as The Taipei 101 (skyscraper).
In other words, 456.8 meters is 0.899 times the height of The Taipei 101 (skyscraper), and the height of The Taipei 101 (skyscraper) is 1.11 times that amount.
(a.k.a. Taipei Financial Center, a.k.a. 台北101, a.k.a. 臺北101) (Xinyi District, Taipei, Taiwan) (to spire)
The Taipei 101 reaches 508 m to its spire. The tower itself is said to be the style in world's tallest sundial, with the circular area of the adjacent Millennium Park acting as the sundial's face.
It's about nine-tenths as tall as The Sears Tower.
In other words, 456.8 meters is 0.867 times the height of The Sears Tower, and the height of The Sears Tower is 1.15 times that amount.
(a.k.a. Willis Tower) (Chicago, Illinois) (to antenna peak)
The Willis Tower rises to 527.0 m to the top of its tallest antenna. The bathrooms on the 103rd floor are said to be the highest in the western hemisphere at 412.4m.
It's about nine-tenths as tall as The Ostankino Tower.
In other words, 456.8 meters is 0.85 times the height of The Ostankino Tower, and the height of The Ostankino Tower is 1.2 times that amount.
(a.k.a. Останкинская телебашня) (Moscow, Russia) (to spire)
The Ostankino Tower stands 540 m to its spire. The tower has been the tallest structure in Europe since its construction in 1967 and was, at at that time, the only free-standing structure taller than 500 m.
It's about one-and-one-fifth times as tall as The Empire State Building.
In other words, 456.8 meters is 1.1989 times the height of The Empire State Building, and the height of The Empire State Building is 0.8341 times that amount.
(New York City, New York) (to top of building)
The Empire State Building stands 381.01 m to its architectural peak. The spire emerging from the top of the building was originally intended to be a mooring mast for blimps whose passengers could disembark onto a landing platform on the 102nd floor of the building.
It's about four-fifths as tall as The CN Tower.
In other words, 456.8 meters is 0.82555 times the height of The CN Tower, and the height of The CN Tower is 1.2113 times that amount.
(a.k.a. La Tour CN, a.k.a. Canadian National Tower, a.k.a. Canada's National Tower) (Toronto, Canada) (to spire)
The CN Tower measures 553.33 m tall at its spire. Used only in emergencies and for charitable climbing events, the 2,579-step staircase to the top is the longest metal staircase in the world.