Finding the Fourth Proportional to 987,136,051.20, 1,480,704,076.80 and 503,406,643.20
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Solution
The fourth proportional to 987,136,051.20, 1,480,704,076.80 and 503,406,643.20 is: 755,109,964.80
Step by Step Solution
- Step 1: Write the proportion equation
987,136,051.20 : 1,480,704,076.80 = 503,406,643.20 : x - Step 2: Convert to fraction form
987,136,051.20/1,480,704,076.80 = 503,406,643.20/x - Step 3: Cross multiply
987,136,051.20x = 1,480,704,076.80 × 503,406,643.20 - Step 4: Simplify right side
987,136,051.20x = 745,396,268,874,443,008 - Step 5: Solve for x
x = 745,396,268,874,443,008/987,136,051.20 - Step 6: Final answer
x = 755,109,964.80
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.