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Finding the Fourth Proportional to 658.12, 987.18 and 487.24

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Solution

The fourth proportional to 658.12, 987.18 and 487.24 is: 730.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.12 : 987.18 = 487.24 : x
  2. Step 2: Convert to fraction form
    658.12/987.18 = 487.24/x
  3. Step 3: Cross multiply
    658.12x = 987.18 × 487.24
  4. Step 4: Simplify right side
    658.12x = 480,993.58
  5. Step 5: Solve for x
    x = 480,993.58/658.12
  6. Step 6: Final answer
    x = 730.86

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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.