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Finding the Fourth Proportional to 658.69, 988.55 and 248.20

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Solution

The fourth proportional to 658.69, 988.55 and 248.20 is: 372.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.69 : 988.55 = 248.20 : x
  2. Step 2: Convert to fraction form
    658.69/988.55 = 248.20/x
  3. Step 3: Cross multiply
    658.69x = 988.55 × 248.20
  4. Step 4: Simplify right side
    658.69x = 245,356.87
  5. Step 5: Solve for x
    x = 245,356.87/658.69
  6. Step 6: Final answer
    x = 372.49

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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.