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Finding the Fourth Proportional to 637.91, 879.92 and 422.32

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Solution

The fourth proportional to 637.91, 879.92 and 422.32 is: 582.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.91 : 879.92 = 422.32 : x
  2. Step 2: Convert to fraction form
    637.91/879.92 = 422.32/x
  3. Step 3: Cross multiply
    637.91x = 879.92 × 422.32
  4. Step 4: Simplify right side
    637.91x = 371,601.30
  5. Step 5: Solve for x
    x = 371,601.30/637.91
  6. Step 6: Final answer
    x = 582.53

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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.