Home / 2,161.26-3,241.89-680.61

Finding the Fourth Proportional to 2,161.26, 3,241.89 and 680.61

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Solution

The fourth proportional to 2,161.26, 3,241.89 and 680.61 is: 1,020.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.26 : 3,241.89 = 680.61 : x
  2. Step 2: Convert to fraction form
    2,161.26/3,241.89 = 680.61/x
  3. Step 3: Cross multiply
    2,161.26x = 3,241.89 × 680.61
  4. Step 4: Simplify right side
    2,161.26x = 2,206,474.91
  5. Step 5: Solve for x
    x = 2,206,474.91/2,161.26
  6. Step 6: Final answer
    x = 1,020.92

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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.