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Finding the Fourth Proportional to 725.52, 1,086.17 and 655.86

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Solution

The fourth proportional to 725.52, 1,086.17 and 655.86 is: 981.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    725.52 : 1,086.17 = 655.86 : x
  2. Step 2: Convert to fraction form
    725.52/1,086.17 = 655.86/x
  3. Step 3: Cross multiply
    725.52x = 1,086.17 × 655.86
  4. Step 4: Simplify right side
    725.52x = 712,372.18
  5. Step 5: Solve for x
    x = 712,372.18/725.52
  6. Step 6: Final answer
    x = 981.88

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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.