Home / 2,761.11-4,142.68-1,281.05

Finding the Fourth Proportional to 2,761.11, 4,142.68 and 1,281.05

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Solution

The fourth proportional to 2,761.11, 4,142.68 and 1,281.05 is: 1,922.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761.11 : 4,142.68 = 1,281.05 : x
  2. Step 2: Convert to fraction form
    2,761.11/4,142.68 = 1,281.05/x
  3. Step 3: Cross multiply
    2,761.11x = 4,142.68 × 1,281.05
  4. Step 4: Simplify right side
    2,761.11x = 5,306,980.21
  5. Step 5: Solve for x
    x = 5,306,980.21/2,761.11
  6. Step 6: Final answer
    x = 1,922.05

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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.