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Finding the Fourth Proportional to 863.43, 1,295.17 and 490.57

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Solution

The fourth proportional to 863.43, 1,295.17 and 490.57 is: 735.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.43 : 1,295.17 = 490.57 : x
  2. Step 2: Convert to fraction form
    863.43/1,295.17 = 490.57/x
  3. Step 3: Cross multiply
    863.43x = 1,295.17 × 490.57
  4. Step 4: Simplify right side
    863.43x = 635,377.13
  5. Step 5: Solve for x
    x = 635,377.13/863.43
  6. Step 6: Final answer
    x = 735.88

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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.