Finding the Fourth Proportional to 687,036.20, 948,115.64 and 381,132.62
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Solution
The fourth proportional to 687,036.20, 948,115.64 and 381,132.62 is: 525,966.17
Step by Step Solution
- Step 1: Write the proportion equation
687,036.20 : 948,115.64 = 381,132.62 : x - Step 2: Convert to fraction form
687,036.20/948,115.64 = 381,132.62/x - Step 3: Cross multiply
687,036.20x = 948,115.64 × 381,132.62 - Step 4: Simplify right side
687,036.20x = 361,357,797,936.18 - Step 5: Solve for x
x = 361,357,797,936.18/687,036.20 - Step 6: Final answer
x = 525,966.17
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.