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Finding the Fourth Proportional to 422.63, 634.25 and 227.78

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Solution

The fourth proportional to 422.63, 634.25 and 227.78 is: 341.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.63 : 634.25 = 227.78 : x
  2. Step 2: Convert to fraction form
    422.63/634.25 = 227.78/x
  3. Step 3: Cross multiply
    422.63x = 634.25 × 227.78
  4. Step 4: Simplify right side
    422.63x = 144,465.15
  5. Step 5: Solve for x
    x = 144,465.15/422.63
  6. Step 6: Final answer
    x = 341.83

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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.