Home / 2,761.11-4,140.72-911.79

Finding the Fourth Proportional to 2,761.11, 4,140.72 and 911.79

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Solution

The fourth proportional to 2,761.11, 4,140.72 and 911.79 is: 1,367.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761.11 : 4,140.72 = 911.79 : x
  2. Step 2: Convert to fraction form
    2,761.11/4,140.72 = 911.79/x
  3. Step 3: Cross multiply
    2,761.11x = 4,140.72 × 911.79
  4. Step 4: Simplify right side
    2,761.11x = 3,775,467.09
  5. Step 5: Solve for x
    x = 3,775,467.09/2,761.11
  6. Step 6: Final answer
    x = 1,367.37

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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.