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Finding the Fourth Proportional to 844.68, 1,167.09 and 815.11

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Solution

The fourth proportional to 844.68, 1,167.09 and 815.11 is: 1,126.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.68 : 1,167.09 = 815.11 : x
  2. Step 2: Convert to fraction form
    844.68/1,167.09 = 815.11/x
  3. Step 3: Cross multiply
    844.68x = 1,167.09 × 815.11
  4. Step 4: Simplify right side
    844.68x = 951,306.73
  5. Step 5: Solve for x
    x = 951,306.73/844.68
  6. Step 6: Final answer
    x = 1,126.23

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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.