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Finding the Fourth Proportional to 391,488.12, 587,224.17 and 125,248.59

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Solution

The fourth proportional to 391,488.12, 587,224.17 and 125,248.59 is: 187,870.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,488.12 : 587,224.17 = 125,248.59 : x
  2. Step 2: Convert to fraction form
    391,488.12/587,224.17 = 125,248.59/x
  3. Step 3: Cross multiply
    391,488.12x = 587,224.17 × 125,248.59
  4. Step 4: Simplify right side
    391,488.12x = 73,548,999,306.42
  5. Step 5: Solve for x
    x = 73,548,999,306.42/391,488.12
  6. Step 6: Final answer
    x = 187,870.32

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1.5x scale

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.