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Finding the Fourth Proportional to 422.63, 634.25 and 217.37

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Solution

The fourth proportional to 422.63, 634.25 and 217.37 is: 326.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.63 : 634.25 = 217.37 : x
  2. Step 2: Convert to fraction form
    422.63/634.25 = 217.37/x
  3. Step 3: Cross multiply
    422.63x = 634.25 × 217.37
  4. Step 4: Simplify right side
    422.63x = 137,866.92
  5. Step 5: Solve for x
    x = 137,866.92/422.63
  6. Step 6: Final answer
    x = 326.21

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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.