Home / 3,984.29-5,979.16-1,387.23

Finding the Fourth Proportional to 3,984.29, 5,979.16 and 1,387.23

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Solution

The fourth proportional to 3,984.29, 5,979.16 and 1,387.23 is: 2,081.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,984.29 : 5,979.16 = 1,387.23 : x
  2. Step 2: Convert to fraction form
    3,984.29/5,979.16 = 1,387.23/x
  3. Step 3: Cross multiply
    3,984.29x = 5,979.16 × 1,387.23
  4. Step 4: Simplify right side
    3,984.29x = 8,294,471.86
  5. Step 5: Solve for x
    x = 8,294,471.86/3,984.29
  6. Step 6: Final answer
    x = 2,081.79

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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.