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Finding the Fourth Proportional to 457.60, 686.45 and 132.97

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Solution

The fourth proportional to 457.60, 686.45 and 132.97 is: 199.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.60 : 686.45 = 132.97 : x
  2. Step 2: Convert to fraction form
    457.60/686.45 = 132.97/x
  3. Step 3: Cross multiply
    457.60x = 686.45 × 132.97
  4. Step 4: Simplify right side
    457.60x = 91,276.59
  5. Step 5: Solve for x
    x = 91,276.59/457.60
  6. Step 6: Final answer
    x = 199.47

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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.