Home / 3,761.28-5,640.82-1,128.68

Finding the Fourth Proportional to 3,761.28, 5,640.82 and 1,128.68

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Solution

The fourth proportional to 3,761.28, 5,640.82 and 1,128.68 is: 1,692.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,761.28 : 5,640.82 = 1,128.68 : x
  2. Step 2: Convert to fraction form
    3,761.28/5,640.82 = 1,128.68/x
  3. Step 3: Cross multiply
    3,761.28x = 5,640.82 × 1,128.68
  4. Step 4: Simplify right side
    3,761.28x = 6,366,680.72
  5. Step 5: Solve for x
    x = 6,366,680.72/3,761.28
  6. Step 6: Final answer
    x = 1,692.69

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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.