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Finding the Fourth Proportional to 331,691.20, 497,245.20 and 198,624.40

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Solution

The fourth proportional to 331,691.20, 497,245.20 and 198,624.40 is: 297,761.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,691.20 : 497,245.20 = 198,624.40 : x
  2. Step 2: Convert to fraction form
    331,691.20/497,245.20 = 198,624.40/x
  3. Step 3: Cross multiply
    331,691.20x = 497,245.20 × 198,624.40
  4. Step 4: Simplify right side
    331,691.20x = 98,765,029,502.88
  5. Step 5: Solve for x
    x = 98,765,029,502.88/331,691.20
  6. Step 6: Final answer
    x = 297,761.98

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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.