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Finding the Fourth Proportional to 625.70, 863.37 and 392.82

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Solution

The fourth proportional to 625.70, 863.37 and 392.82 is: 542.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.70 : 863.37 = 392.82 : x
  2. Step 2: Convert to fraction form
    625.70/863.37 = 392.82/x
  3. Step 3: Cross multiply
    625.70x = 863.37 × 392.82
  4. Step 4: Simplify right side
    625.70x = 339,149.00
  5. Step 5: Solve for x
    x = 339,149.00/625.70
  6. Step 6: Final answer
    x = 542.04

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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.