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Finding the Fourth Proportional to 3,711.78, 5,122.11 and 2,033.28

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Solution

The fourth proportional to 3,711.78, 5,122.11 and 2,033.28 is: 2,805.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,711.78 : 5,122.11 = 2,033.28 : x
  2. Step 2: Convert to fraction form
    3,711.78/5,122.11 = 2,033.28/x
  3. Step 3: Cross multiply
    3,711.78x = 5,122.11 × 2,033.28
  4. Step 4: Simplify right side
    3,711.78x = 10,414,683.82
  5. Step 5: Solve for x
    x = 10,414,683.82/3,711.78
  6. Step 6: Final answer
    x = 2,805.85

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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.