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Finding the Fourth Proportional to 260,691.27, 391,099.31 and 108,803.88

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Solution

The fourth proportional to 260,691.27, 391,099.31 and 108,803.88 is: 163,231.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,691.27 : 391,099.31 = 108,803.88 : x
  2. Step 2: Convert to fraction form
    260,691.27/391,099.31 = 108,803.88/x
  3. Step 3: Cross multiply
    260,691.27x = 391,099.31 × 108,803.88
  4. Step 4: Simplify right side
    260,691.27x = 42,553,121,849.30
  5. Step 5: Solve for x
    x = 42,553,121,849.30/260,691.27
  6. Step 6: Final answer
    x = 163,231.86

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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.