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Finding the Fourth Proportional to 636.38, 954.67 and 225.42

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Solution

The fourth proportional to 636.38, 954.67 and 225.42 is: 338.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.38 : 954.67 = 225.42 : x
  2. Step 2: Convert to fraction form
    636.38/954.67 = 225.42/x
  3. Step 3: Cross multiply
    636.38x = 954.67 × 225.42
  4. Step 4: Simplify right side
    636.38x = 215,203.25
  5. Step 5: Solve for x
    x = 215,203.25/636.38
  6. Step 6: Final answer
    x = 338.17

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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.