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Finding the Fourth Proportional to 391,505.78, 587,346.01 and 125,282.27

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Solution

The fourth proportional to 391,505.78, 587,346.01 and 125,282.27 is: 187,951.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,505.78 : 587,346.01 = 125,282.27 : x
  2. Step 2: Convert to fraction form
    391,505.78/587,346.01 = 125,282.27/x
  3. Step 3: Cross multiply
    391,505.78x = 587,346.01 × 125,282.27
  4. Step 4: Simplify right side
    391,505.78x = 73,584,038,158.31
  5. Step 5: Solve for x
    x = 73,584,038,158.31/391,505.78
  6. Step 6: Final answer
    x = 187,951.35

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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.