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Finding the Fourth Proportional to 391,523.52, 587,328.24 and 125,221.44

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Solution

The fourth proportional to 391,523.52, 587,328.24 and 125,221.44 is: 187,845.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,523.52 : 587,328.24 = 125,221.44 : x
  2. Step 2: Convert to fraction form
    391,523.52/587,328.24 = 125,221.44/x
  3. Step 3: Cross multiply
    391,523.52x = 587,328.24 × 125,221.44
  4. Step 4: Simplify right side
    391,523.52x = 73,546,087,965.47
  5. Step 5: Solve for x
    x = 73,546,087,965.47/391,523.52
  6. Step 6: Final answer
    x = 187,845.90

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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.