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Finding the Fourth Proportional to 658.20, 986.68 and 225.08

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Solution

The fourth proportional to 658.20, 986.68 and 225.08 is: 337.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.20 : 986.68 = 225.08 : x
  2. Step 2: Convert to fraction form
    658.20/986.68 = 225.08/x
  3. Step 3: Cross multiply
    658.20x = 986.68 × 225.08
  4. Step 4: Simplify right side
    658.20x = 222,081.93
  5. Step 5: Solve for x
    x = 222,081.93/658.20
  6. Step 6: Final answer
    x = 337.41

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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.