Home / 3,791.28-5,686.89-1,158.78

Finding the Fourth Proportional to 3,791.28, 5,686.89 and 1,158.78

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Solution

The fourth proportional to 3,791.28, 5,686.89 and 1,158.78 is: 1,738.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,791.28 : 5,686.89 = 1,158.78 : x
  2. Step 2: Convert to fraction form
    3,791.28/5,686.89 = 1,158.78/x
  3. Step 3: Cross multiply
    3,791.28x = 5,686.89 × 1,158.78
  4. Step 4: Simplify right side
    3,791.28x = 6,589,854.39
  5. Step 5: Solve for x
    x = 6,589,854.39/3,791.28
  6. Step 6: Final answer
    x = 1,738.16

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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.