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Finding the Fourth Proportional to 658.29, 987.83 and 247.42

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Solution

The fourth proportional to 658.29, 987.83 and 247.42 is: 371.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.29 : 987.83 = 247.42 : x
  2. Step 2: Convert to fraction form
    658.29/987.83 = 247.42/x
  3. Step 3: Cross multiply
    658.29x = 987.83 × 247.42
  4. Step 4: Simplify right side
    658.29x = 244,409.82
  5. Step 5: Solve for x
    x = 244,409.82/658.29
  6. Step 6: Final answer
    x = 371.28

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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.