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Finding the Fourth Proportional to 391,505.40, 587,345.45 and 125,281.89

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Solution

The fourth proportional to 391,505.40, 587,345.45 and 125,281.89 is: 187,950.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,505.40 : 587,345.45 = 125,281.89 : x
  2. Step 2: Convert to fraction form
    391,505.40/587,345.45 = 125,281.89/x
  3. Step 3: Cross multiply
    391,505.40x = 587,345.45 × 125,281.89
  4. Step 4: Simplify right side
    391,505.40x = 73,583,747,432.49
  5. Step 5: Solve for x
    x = 73,583,747,432.49/391,505.40
  6. Step 6: Final answer
    x = 187,950.79

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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.