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Finding the Fourth Proportional to 658.63, 987.49 and 247.66

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Solution

The fourth proportional to 658.63, 987.49 and 247.66 is: 371.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.63 : 987.49 = 247.66 : x
  2. Step 2: Convert to fraction form
    658.63/987.49 = 247.66/x
  3. Step 3: Cross multiply
    658.63x = 987.49 × 247.66
  4. Step 4: Simplify right side
    658.63x = 244,559.61
  5. Step 5: Solve for x
    x = 244,559.61/658.63
  6. Step 6: Final answer
    x = 371.31

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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.