# Writing and Solving a Proportion EXAMPLE 3 STEP 1 Write a proportion. Let x represent the number of floors passed in 9 seconds. Empire State Building The.

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Writing and Solving a Proportion EXAMPLE 3 STEP 1 Write a proportion. Let x represent the number of floors passed in 9 seconds. Empire State Building The elevators in the Empire State Building can pass 80 floors in 45 seconds.Follow the steps below to find the number of floors that the elevators can pass in 9 seconds. x80 45 9 = seconds floor

EXAMPLE 3 STEP 2 Solve the proportion. 80 45 x 9 == x 9 9 80 45 9 16 = x Write original proportion. Multiply each side by 9. Simplify fraction. Simplify. 720 45 x = ANSWER The elevators can pass 16 floors in 9 seconds. Writing and Solving a Proportion

GUIDED PRACTICE for Example 3 ANSWER 10 floors Suppose the elevators in Example 3 could pass 70 floors in 63 seconds. How many floors could the elevator pass in 9 seconds? What If? 9.

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