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Finding the Fourth Proportional to 658.85, 988.10 and 248.11

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Solution

The fourth proportional to 658.85, 988.10 and 248.11 is: 372.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.85 : 988.10 = 248.11 : x
  2. Step 2: Convert to fraction form
    658.85/988.10 = 248.11/x
  3. Step 3: Cross multiply
    658.85x = 988.10 × 248.11
  4. Step 4: Simplify right side
    658.85x = 245,153.78
  5. Step 5: Solve for x
    x = 245,153.78/658.85
  6. Step 6: Final answer
    x = 372.10

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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.