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Finding the Fourth Proportional to 2,512.97, 3,769.96 and 869.48

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Solution

The fourth proportional to 2,512.97, 3,769.96 and 869.48 is: 1,304.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,512.97 : 3,769.96 = 869.48 : x
  2. Step 2: Convert to fraction form
    2,512.97/3,769.96 = 869.48/x
  3. Step 3: Cross multiply
    2,512.97x = 3,769.96 × 869.48
  4. Step 4: Simplify right side
    2,512.97x = 3,277,883.80
  5. Step 5: Solve for x
    x = 3,277,883.80/2,512.97
  6. Step 6: Final answer
    x = 1,304.39

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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.