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Finding the Fourth Proportional to 391,577.77, 587,440.16 and 125,266.78

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Solution

The fourth proportional to 391,577.77, 587,440.16 and 125,266.78 is: 187,923.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,577.77 : 587,440.16 = 125,266.78 : x
  2. Step 2: Convert to fraction form
    391,577.77/587,440.16 = 125,266.78/x
  3. Step 3: Cross multiply
    391,577.77x = 587,440.16 × 125,266.78
  4. Step 4: Simplify right side
    391,577.77x = 73,586,737,285.88
  5. Step 5: Solve for x
    x = 73,586,737,285.88/391,577.77
  6. Step 6: Final answer
    x = 187,923.68

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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.