Home / 2,760.80-4,141.11-911.87

Finding the Fourth Proportional to 2,760.80, 4,141.11 and 911.87

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Solution

The fourth proportional to 2,760.80, 4,141.11 and 911.87 is: 1,367.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,760.80 : 4,141.11 = 911.87 : x
  2. Step 2: Convert to fraction form
    2,760.80/4,141.11 = 911.87/x
  3. Step 3: Cross multiply
    2,760.80x = 4,141.11 × 911.87
  4. Step 4: Simplify right side
    2,760.80x = 3,776,164.33
  5. Step 5: Solve for x
    x = 3,776,164.33/2,760.80
  6. Step 6: Final answer
    x = 1,367.78

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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.