Home / 2,540.85-3,811.27-1,079.20

Finding the Fourth Proportional to 2,540.85, 3,811.27 and 1,079.20

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Solution

The fourth proportional to 2,540.85, 3,811.27 and 1,079.20 is: 1,618.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,540.85 : 3,811.27 = 1,079.20 : x
  2. Step 2: Convert to fraction form
    2,540.85/3,811.27 = 1,079.20/x
  3. Step 3: Cross multiply
    2,540.85x = 3,811.27 × 1,079.20
  4. Step 4: Simplify right side
    2,540.85x = 4,113,122.58
  5. Step 5: Solve for x
    x = 4,113,122.58/2,540.85
  6. Step 6: Final answer
    x = 1,618.80

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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.