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Finding the Fourth Proportional to 498,892.78, 688,470.87 and 272,539.90

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Solution

The fourth proportional to 498,892.78, 688,470.87 and 272,539.90 is: 376,104.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,892.78 : 688,470.87 = 272,539.90 : x
  2. Step 2: Convert to fraction form
    498,892.78/688,470.87 = 272,539.90/x
  3. Step 3: Cross multiply
    498,892.78x = 688,470.87 × 272,539.90
  4. Step 4: Simplify right side
    498,892.78x = 187,635,782,062.71
  5. Step 5: Solve for x
    x = 187,635,782,062.71/498,892.78
  6. Step 6: Final answer
    x = 376,104.42

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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.