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Finding the Fourth Proportional to 457.46, 686.22 and 132.85

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Solution

The fourth proportional to 457.46, 686.22 and 132.85 is: 199.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.46 : 686.22 = 132.85 : x
  2. Step 2: Convert to fraction form
    457.46/686.22 = 132.85/x
  3. Step 3: Cross multiply
    457.46x = 686.22 × 132.85
  4. Step 4: Simplify right side
    457.46x = 91,162.61
  5. Step 5: Solve for x
    x = 91,162.61/457.46
  6. Step 6: Final answer
    x = 199.28

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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.