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Finding the Fourth Proportional to 836.82, 1,255.71 and 672.48

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Solution

The fourth proportional to 836.82, 1,255.71 and 672.48 is: 1,009.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.82 : 1,255.71 = 672.48 : x
  2. Step 2: Convert to fraction form
    836.82/1,255.71 = 672.48/x
  3. Step 3: Cross multiply
    836.82x = 1,255.71 × 672.48
  4. Step 4: Simplify right side
    836.82x = 844,439.86
  5. Step 5: Solve for x
    x = 844,439.86/836.82
  6. Step 6: Final answer
    x = 1,009.11

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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.