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Finding the Fourth Proportional to 328,691.39, 493,316.85 and 129,151.31

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Solution

The fourth proportional to 328,691.39, 493,316.85 and 129,151.31 is: 193,836.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,691.39 : 493,316.85 = 129,151.31 : x
  2. Step 2: Convert to fraction form
    328,691.39/493,316.85 = 129,151.31/x
  3. Step 3: Cross multiply
    328,691.39x = 493,316.85 × 129,151.31
  4. Step 4: Simplify right side
    328,691.39x = 63,712,517,422.57
  5. Step 5: Solve for x
    x = 63,712,517,422.57/328,691.39
  6. Step 6: Final answer
    x = 193,836.89

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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.