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Finding the Fourth Proportional to 658.86, 988.32 and 247.86

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Solution

The fourth proportional to 658.86, 988.32 and 247.86 is: 371.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.86 : 988.32 = 247.86 : x
  2. Step 2: Convert to fraction form
    658.86/988.32 = 247.86/x
  3. Step 3: Cross multiply
    658.86x = 988.32 × 247.86
  4. Step 4: Simplify right side
    658.86x = 244,965.00
  5. Step 5: Solve for x
    x = 244,965.00/658.86
  6. Step 6: Final answer
    x = 371.80

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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.