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Finding the Fourth Proportional to 636.38, 954.58 and 225.43

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Solution

The fourth proportional to 636.38, 954.58 and 225.43 is: 338.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.38 : 954.58 = 225.43 : x
  2. Step 2: Convert to fraction form
    636.38/954.58 = 225.43/x
  3. Step 3: Cross multiply
    636.38x = 954.58 × 225.43
  4. Step 4: Simplify right side
    636.38x = 215,190.97
  5. Step 5: Solve for x
    x = 215,190.97/636.38
  6. Step 6: Final answer
    x = 338.15

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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.