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Finding the Fourth Proportional to 836.43, 1,255.52 and 425.44

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Solution

The fourth proportional to 836.43, 1,255.52 and 425.44 is: 638.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.43 : 1,255.52 = 425.44 : x
  2. Step 2: Convert to fraction form
    836.43/1,255.52 = 425.44/x
  3. Step 3: Cross multiply
    836.43x = 1,255.52 × 425.44
  4. Step 4: Simplify right side
    836.43x = 534,148.43
  5. Step 5: Solve for x
    x = 534,148.43/836.43
  6. Step 6: Final answer
    x = 638.61

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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.