Finding the Fourth Proportional to 687,543.14, 1,031,364.40 and 287,781.68
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Solution
The fourth proportional to 687,543.14, 1,031,364.40 and 287,781.68 is: 431,693.32
Step by Step Solution
- Step 1: Write the proportion equation
687,543.14 : 1,031,364.40 = 287,781.68 : x - Step 2: Convert to fraction form
687,543.14/1,031,364.40 = 287,781.68/x - Step 3: Cross multiply
687,543.14x = 1,031,364.40 × 287,781.68 - Step 4: Simplify right side
687,543.14x = 296,807,779,724.19 - Step 5: Solve for x
x = 296,807,779,724.19/687,543.14 - Step 6: Final answer
x = 431,693.32
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.