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Finding the Fourth Proportional to 457.54, 686.29 and 132.90

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Solution

The fourth proportional to 457.54, 686.29 and 132.90 is: 199.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.54 : 686.29 = 132.90 : x
  2. Step 2: Convert to fraction form
    457.54/686.29 = 132.90/x
  3. Step 3: Cross multiply
    457.54x = 686.29 × 132.90
  4. Step 4: Simplify right side
    457.54x = 91,207.94
  5. Step 5: Solve for x
    x = 91,207.94/457.54
  6. Step 6: Final answer
    x = 199.34

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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.