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Finding the Fourth Proportional to 632.29, 872.13 and 422.38

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Solution

The fourth proportional to 632.29, 872.13 and 422.38 is: 582.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.29 : 872.13 = 422.38 : x
  2. Step 2: Convert to fraction form
    632.29/872.13 = 422.38/x
  3. Step 3: Cross multiply
    632.29x = 872.13 × 422.38
  4. Step 4: Simplify right side
    632.29x = 368,370.27
  5. Step 5: Solve for x
    x = 368,370.27/632.29
  6. Step 6: Final answer
    x = 582.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.