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Finding the Fourth Proportional to 394,772.59, 592,097.11 and 128,531.31

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Solution

The fourth proportional to 394,772.59, 592,097.11 and 128,531.31 is: 192,776.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,772.59 : 592,097.11 = 128,531.31 : x
  2. Step 2: Convert to fraction form
    394,772.59/592,097.11 = 128,531.31/x
  3. Step 3: Cross multiply
    394,772.59x = 592,097.11 × 128,531.31
  4. Step 4: Simplify right side
    394,772.59x = 76,103,016,874.19
  5. Step 5: Solve for x
    x = 76,103,016,874.19/394,772.59
  6. Step 6: Final answer
    x = 192,776.85

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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.