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Finding the Fourth Proportional to 439.48, 659.58 and 422.92

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Solution

The fourth proportional to 439.48, 659.58 and 422.92 is: 634.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.48 : 659.58 = 422.92 : x
  2. Step 2: Convert to fraction form
    439.48/659.58 = 422.92/x
  3. Step 3: Cross multiply
    439.48x = 659.58 × 422.92
  4. Step 4: Simplify right side
    439.48x = 278,949.57
  5. Step 5: Solve for x
    x = 278,949.57/439.48
  6. Step 6: Final answer
    x = 634.73

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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.