Home / 2,581.43-3,872.14-1,120.55

Finding the Fourth Proportional to 2,581.43, 3,872.14 and 1,120.55

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Solution

The fourth proportional to 2,581.43, 3,872.14 and 1,120.55 is: 1,680.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,581.43 : 3,872.14 = 1,120.55 : x
  2. Step 2: Convert to fraction form
    2,581.43/3,872.14 = 1,120.55/x
  3. Step 3: Cross multiply
    2,581.43x = 3,872.14 × 1,120.55
  4. Step 4: Simplify right side
    2,581.43x = 4,338,933.36
  5. Step 5: Solve for x
    x = 4,338,933.36/2,581.43
  6. Step 6: Final answer
    x = 1,680.82

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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.