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Finding the Fourth Proportional to 658.41, 987.80 and 247.56

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Solution

The fourth proportional to 658.41, 987.80 and 247.56 is: 371.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.41 : 987.80 = 247.56 : x
  2. Step 2: Convert to fraction form
    658.41/987.80 = 247.56/x
  3. Step 3: Cross multiply
    658.41x = 987.80 × 247.56
  4. Step 4: Simplify right side
    658.41x = 244,538.53
  5. Step 5: Solve for x
    x = 244,538.53/658.41
  6. Step 6: Final answer
    x = 371.41

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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.