Home / 3,986.72-5,979.85-1,213.33

Finding the Fourth Proportional to 3,986.72, 5,979.85 and 1,213.33

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Solution

The fourth proportional to 3,986.72, 5,979.85 and 1,213.33 is: 1,819.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.72 : 5,979.85 = 1,213.33 : x
  2. Step 2: Convert to fraction form
    3,986.72/5,979.85 = 1,213.33/x
  3. Step 3: Cross multiply
    3,986.72x = 5,979.85 × 1,213.33
  4. Step 4: Simplify right side
    3,986.72x = 7,255,528.04
  5. Step 5: Solve for x
    x = 7,255,528.04/3,986.72
  6. Step 6: Final answer
    x = 1,819.92

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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.