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Finding the Fourth Proportional to 2,000.79, 2,761.14 and 1,116.57

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Solution

The fourth proportional to 2,000.79, 2,761.14 and 1,116.57 is: 1,540.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,000.79 : 2,761.14 = 1,116.57 : x
  2. Step 2: Convert to fraction form
    2,000.79/2,761.14 = 1,116.57/x
  3. Step 3: Cross multiply
    2,000.79x = 2,761.14 × 1,116.57
  4. Step 4: Simplify right side
    2,000.79x = 3,083,006.09
  5. Step 5: Solve for x
    x = 3,083,006.09/2,000.79
  6. Step 6: Final answer
    x = 1,540.90

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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.