Home / 3,984.24-5,976.68-1,387.20

Finding the Fourth Proportional to 3,984.24, 5,976.68 and 1,387.20

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Solution

The fourth proportional to 3,984.24, 5,976.68 and 1,387.20 is: 2,080.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,984.24 : 5,976.68 = 1,387.20 : x
  2. Step 2: Convert to fraction form
    3,984.24/5,976.68 = 1,387.20/x
  3. Step 3: Cross multiply
    3,984.24x = 5,976.68 × 1,387.20
  4. Step 4: Simplify right side
    3,984.24x = 8,290,850.50
  5. Step 5: Solve for x
    x = 8,290,850.50/3,984.24
  6. Step 6: Final answer
    x = 2,080.91

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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.