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Finding the Fourth Proportional to 457.52, 686.22 and 149.38

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Solution

The fourth proportional to 457.52, 686.22 and 149.38 is: 224.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.52 : 686.22 = 149.38 : x
  2. Step 2: Convert to fraction form
    457.52/686.22 = 149.38/x
  3. Step 3: Cross multiply
    457.52x = 686.22 × 149.38
  4. Step 4: Simplify right side
    457.52x = 102,507.54
  5. Step 5: Solve for x
    x = 102,507.54/457.52
  6. Step 6: Final answer
    x = 224.05

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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.