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Finding the Fourth Proportional to 422.33, 632.98 and 216.79

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Solution

The fourth proportional to 422.33, 632.98 and 216.79 is: 324.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.33 : 632.98 = 216.79 : x
  2. Step 2: Convert to fraction form
    422.33/632.98 = 216.79/x
  3. Step 3: Cross multiply
    422.33x = 632.98 × 216.79
  4. Step 4: Simplify right side
    422.33x = 137,223.73
  5. Step 5: Solve for x
    x = 137,223.73/422.33
  6. Step 6: Final answer
    x = 324.92

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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.