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Finding the Fourth Proportional to 636.60, 954.97 and 225.78

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Solution

The fourth proportional to 636.60, 954.97 and 225.78 is: 338.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.60 : 954.97 = 225.78 : x
  2. Step 2: Convert to fraction form
    636.60/954.97 = 225.78/x
  3. Step 3: Cross multiply
    636.60x = 954.97 × 225.78
  4. Step 4: Simplify right side
    636.60x = 215,613.13
  5. Step 5: Solve for x
    x = 215,613.13/636.60
  6. Step 6: Final answer
    x = 338.69

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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.