Home / 2,082.20-3,121.20-1,040.60

Finding the Fourth Proportional to 2,082.20, 3,121.20 and 1,040.60

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Solution

The fourth proportional to 2,082.20, 3,121.20 and 1,040.60 is: 1,559.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,082.20 : 3,121.20 = 1,040.60 : x
  2. Step 2: Convert to fraction form
    2,082.20/3,121.20 = 1,040.60/x
  3. Step 3: Cross multiply
    2,082.20x = 3,121.20 × 1,040.60
  4. Step 4: Simplify right side
    2,082.20x = 3,247,920.72
  5. Step 5: Solve for x
    x = 3,247,920.72/2,082.20
  6. Step 6: Final answer
    x = 1,559.85

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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.