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Finding the Fourth Proportional to 663,285.29, 915,366.14 and 372,988.20

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Solution

The fourth proportional to 663,285.29, 915,366.14 and 372,988.20 is: 514,741.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,285.29 : 915,366.14 = 372,988.20 : x
  2. Step 2: Convert to fraction form
    663,285.29/915,366.14 = 372,988.20/x
  3. Step 3: Cross multiply
    663,285.29x = 915,366.14 × 372,988.20
  4. Step 4: Simplify right side
    663,285.29x = 341,420,767,034.61
  5. Step 5: Solve for x
    x = 341,420,767,034.61/663,285.29
  6. Step 6: Final answer
    x = 514,741.96

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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.