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Finding the Fourth Proportional to 391,532.72, 587,290.84 and 125,293.28

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Solution

The fourth proportional to 391,532.72, 587,290.84 and 125,293.28 is: 187,937.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,532.72 : 587,290.84 = 125,293.28 : x
  2. Step 2: Convert to fraction form
    391,532.72/587,290.84 = 125,293.28/x
  3. Step 3: Cross multiply
    391,532.72x = 587,290.84 × 125,293.28
  4. Step 4: Simplify right side
    391,532.72x = 73,583,595,657.56
  5. Step 5: Solve for x
    x = 73,583,595,657.56/391,532.72
  6. Step 6: Final answer
    x = 187,937.28

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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.