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Finding the Fourth Proportional to 391,557.68, 587,379.16 and 125,255.60

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Solution

The fourth proportional to 391,557.68, 587,379.16 and 125,255.60 is: 187,897.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,557.68 : 587,379.16 = 125,255.60 : x
  2. Step 2: Convert to fraction form
    391,557.68/587,379.16 = 125,255.60/x
  3. Step 3: Cross multiply
    391,557.68x = 587,379.16 × 125,255.60
  4. Step 4: Simplify right side
    391,557.68x = 73,572,529,113.30
  5. Step 5: Solve for x
    x = 73,572,529,113.30/391,557.68
  6. Step 6: Final answer
    x = 187,897.04

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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.