Home / 3,979.45-5,489.31-2,719.90

Finding the Fourth Proportional to 3,979.45, 5,489.31 and 2,719.90

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Solution

The fourth proportional to 3,979.45, 5,489.31 and 2,719.90 is: 3,751.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.45 : 5,489.31 = 2,719.90 : x
  2. Step 2: Convert to fraction form
    3,979.45/5,489.31 = 2,719.90/x
  3. Step 3: Cross multiply
    3,979.45x = 5,489.31 × 2,719.90
  4. Step 4: Simplify right side
    3,979.45x = 14,930,374.27
  5. Step 5: Solve for x
    x = 14,930,374.27/3,979.45
  6. Step 6: Final answer
    x = 3,751.87

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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.