Home / 3,939.20-5,908.80-1,341.92

Finding the Fourth Proportional to 3,939.20, 5,908.80 and 1,341.92

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Solution

The fourth proportional to 3,939.20, 5,908.80 and 1,341.92 is: 2,012.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.20 : 5,908.80 = 1,341.92 : x
  2. Step 2: Convert to fraction form
    3,939.20/5,908.80 = 1,341.92/x
  3. Step 3: Cross multiply
    3,939.20x = 5,908.80 × 1,341.92
  4. Step 4: Simplify right side
    3,939.20x = 7,929,136.90
  5. Step 5: Solve for x
    x = 7,929,136.90/3,939.20
  6. Step 6: Final answer
    x = 2,012.88

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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.