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Finding the Fourth Proportional to 391,479.30, 587,306.52 and 125,255.76

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Solution

The fourth proportional to 391,479.30, 587,306.52 and 125,255.76 is: 187,911.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,479.30 : 587,306.52 = 125,255.76 : x
  2. Step 2: Convert to fraction form
    391,479.30/587,306.52 = 125,255.76/x
  3. Step 3: Cross multiply
    391,479.30x = 587,306.52 × 125,255.76
  4. Step 4: Simplify right side
    391,479.30x = 73,563,524,515.56
  5. Step 5: Solve for x
    x = 73,563,524,515.56/391,479.30
  6. Step 6: Final answer
    x = 187,911.66

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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.