Home / 2,082.20-3,122.09-986.55

Finding the Fourth Proportional to 2,082.20, 3,122.09 and 986.55

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Solution

The fourth proportional to 2,082.20, 3,122.09 and 986.55 is: 1,479.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,082.20 : 3,122.09 = 986.55 : x
  2. Step 2: Convert to fraction form
    2,082.20/3,122.09 = 986.55/x
  3. Step 3: Cross multiply
    2,082.20x = 3,122.09 × 986.55
  4. Step 4: Simplify right side
    2,082.20x = 3,080,092.96
  5. Step 5: Solve for x
    x = 3,080,092.96/2,082.20
  6. Step 6: Final answer
    x = 1,479.25

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1.5x scale

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.