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Finding the Fourth Proportional to 458.02, 686.96 and 149.87

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Solution

The fourth proportional to 458.02, 686.96 and 149.87 is: 224.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.02 : 686.96 = 149.87 : x
  2. Step 2: Convert to fraction form
    458.02/686.96 = 149.87/x
  3. Step 3: Cross multiply
    458.02x = 686.96 × 149.87
  4. Step 4: Simplify right side
    458.02x = 102,954.70
  5. Step 5: Solve for x
    x = 102,954.70/458.02
  6. Step 6: Final answer
    x = 224.78

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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.