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Finding the Fourth Proportional to 658.47, 987.57 and 196.23

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Solution

The fourth proportional to 658.47, 987.57 and 196.23 is: 294.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.47 : 987.57 = 196.23 : x
  2. Step 2: Convert to fraction form
    658.47/987.57 = 196.23/x
  3. Step 3: Cross multiply
    658.47x = 987.57 × 196.23
  4. Step 4: Simplify right side
    658.47x = 193,790.86
  5. Step 5: Solve for x
    x = 193,790.86/658.47
  6. Step 6: Final answer
    x = 294.30

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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.