Posted by **Eleanna** on Monday, February 20, 2012 at 8:09pm.

The Washington Monument is the tallest structure in Washington D.C. At the same time the monument casts a shadow that is about 500 feet long, a 40 foot flagpole nearby casts a shadow that is about 36 feet long. Make a sketch. Find the approximate height of the monument.

- math -
**Ms. Sue**, Monday, February 20, 2012 at 8:12pm
Use a proportion. Cross multiply and solve for x.

x/500 = 40/36

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**Eleanna**, Monday, February 20, 2012 at 8:14pm
Still don't understand :/ help please.

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**Ms. Sue**, Monday, February 20, 2012 at 8:18pm
x/500 = 40/36

36x = 20,000

x = 20,000 / 36

x = 555.6

The Washington Monument is about 556 feet tall.

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