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Finding the Fourth Proportional to 391,918.40, 588,119.52 and 181,517.12

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Solution

The fourth proportional to 391,918.40, 588,119.52 and 181,517.12 is: 272,387.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,918.40 : 588,119.52 = 181,517.12 : x
  2. Step 2: Convert to fraction form
    391,918.40/588,119.52 = 181,517.12/x
  3. Step 3: Cross multiply
    391,918.40x = 588,119.52 × 181,517.12
  4. Step 4: Simplify right side
    391,918.40x = 106,753,761,486.18
  5. Step 5: Solve for x
    x = 106,753,761,486.18/391,918.40
  6. Step 6: Final answer
    x = 272,387.73

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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.