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Finding the Fourth Proportional to 658.76, 988.10 and 247.87

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Solution

The fourth proportional to 658.76, 988.10 and 247.87 is: 371.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.76 : 988.10 = 247.87 : x
  2. Step 2: Convert to fraction form
    658.76/988.10 = 247.87/x
  3. Step 3: Cross multiply
    658.76x = 988.10 × 247.87
  4. Step 4: Simplify right side
    658.76x = 244,915.41
  5. Step 5: Solve for x
    x = 244,915.41/658.76
  6. Step 6: Final answer
    x = 371.78

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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.