Home / 3,986.28-5,979.63-1,213.03

Finding the Fourth Proportional to 3,986.28, 5,979.63 and 1,213.03

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Solution

The fourth proportional to 3,986.28, 5,979.63 and 1,213.03 is: 1,819.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.28 : 5,979.63 = 1,213.03 : x
  2. Step 2: Convert to fraction form
    3,986.28/5,979.63 = 1,213.03/x
  3. Step 3: Cross multiply
    3,986.28x = 5,979.63 × 1,213.03
  4. Step 4: Simplify right side
    3,986.28x = 7,253,470.58
  5. Step 5: Solve for x
    x = 7,253,470.58/3,986.28
  6. Step 6: Final answer
    x = 1,819.61

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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.