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Finding the Fourth Proportional to 391,253.88, 539,932.60 and 230,115.72

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Solution

The fourth proportional to 391,253.88, 539,932.60 and 230,115.72 is: 317,561.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,253.88 : 539,932.60 = 230,115.72 : x
  2. Step 2: Convert to fraction form
    391,253.88/539,932.60 = 230,115.72/x
  3. Step 3: Cross multiply
    391,253.88x = 539,932.60 × 230,115.72
  4. Step 4: Simplify right side
    391,253.88x = 124,246,979,000.47
  5. Step 5: Solve for x
    x = 124,246,979,000.47/391,253.88
  6. Step 6: Final answer
    x = 317,561.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.