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Finding the Fourth Proportional to 391,506.38, 587,167.67 and 220,801.92

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Solution

The fourth proportional to 391,506.38, 587,167.67 and 220,801.92 is: 331,151.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,506.38 : 587,167.67 = 220,801.92 : x
  2. Step 2: Convert to fraction form
    391,506.38/587,167.67 = 220,801.92/x
  3. Step 3: Cross multiply
    391,506.38x = 587,167.67 × 220,801.92
  4. Step 4: Simplify right side
    391,506.38x = 129,647,748,897.93
  5. Step 5: Solve for x
    x = 129,647,748,897.93/391,506.38
  6. Step 6: Final answer
    x = 331,151.05

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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.