Home / 2,761.20-4,141.08-911.70

Finding the Fourth Proportional to 2,761.20, 4,141.08 and 911.70

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Solution

The fourth proportional to 2,761.20, 4,141.08 and 911.70 is: 1,367.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761.20 : 4,141.08 = 911.70 : x
  2. Step 2: Convert to fraction form
    2,761.20/4,141.08 = 911.70/x
  3. Step 3: Cross multiply
    2,761.20x = 4,141.08 × 911.70
  4. Step 4: Simplify right side
    2,761.20x = 3,775,422.64
  5. Step 5: Solve for x
    x = 3,775,422.64/2,761.20
  6. Step 6: Final answer
    x = 1,367.31

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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.