Home / 3,979.26-5,965.25-1,380.38

Finding the Fourth Proportional to 3,979.26, 5,965.25 and 1,380.38

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Solution

The fourth proportional to 3,979.26, 5,965.25 and 1,380.38 is: 2,069.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.26 : 5,965.25 = 1,380.38 : x
  2. Step 2: Convert to fraction form
    3,979.26/5,965.25 = 1,380.38/x
  3. Step 3: Cross multiply
    3,979.26x = 5,965.25 × 1,380.38
  4. Step 4: Simplify right side
    3,979.26x = 8,234,275.07
  5. Step 5: Solve for x
    x = 8,234,275.07/3,979.26
  6. Step 6: Final answer
    x = 2,069.30

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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.