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Finding the Fourth Proportional to 658.13, 987.19 and 171.18

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Solution

The fourth proportional to 658.13, 987.19 and 171.18 is: 256.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.13 : 987.19 = 171.18 : x
  2. Step 2: Convert to fraction form
    658.13/987.19 = 171.18/x
  3. Step 3: Cross multiply
    658.13x = 987.19 × 171.18
  4. Step 4: Simplify right side
    658.13x = 168,982.59
  5. Step 5: Solve for x
    x = 168,982.59/658.13
  6. Step 6: Final answer
    x = 256.76

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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.