Home / 2,255.68-3,379.20-1,278.88

Finding the Fourth Proportional to 2,255.68, 3,379.20 and 1,278.88

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Solution

The fourth proportional to 2,255.68, 3,379.20 and 1,278.88 is: 1,915.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,255.68 : 3,379.20 = 1,278.88 : x
  2. Step 2: Convert to fraction form
    2,255.68/3,379.20 = 1,278.88/x
  3. Step 3: Cross multiply
    2,255.68x = 3,379.20 × 1,278.88
  4. Step 4: Simplify right side
    2,255.68x = 4,321,591.30
  5. Step 5: Solve for x
    x = 4,321,591.30/2,255.68
  6. Step 6: Final answer
    x = 1,915.87

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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.