Home / 2,139.28-3,205.26-1,680.04

Finding the Fourth Proportional to 2,139.28, 3,205.26 and 1,680.04

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Solution

The fourth proportional to 2,139.28, 3,205.26 and 1,680.04 is: 2,517.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.28 : 3,205.26 = 1,680.04 : x
  2. Step 2: Convert to fraction form
    2,139.28/3,205.26 = 1,680.04/x
  3. Step 3: Cross multiply
    2,139.28x = 3,205.26 × 1,680.04
  4. Step 4: Simplify right side
    2,139.28x = 5,384,965.01
  5. Step 5: Solve for x
    x = 5,384,965.01/2,139.28
  6. Step 6: Final answer
    x = 2,517.19

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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.