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Finding the Fourth Proportional to 2,791, 4,187.18 and 843.22

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Solution

The fourth proportional to 2,791, 4,187.18 and 843.22 is: 1,265.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791 : 4,187.18 = 843.22 : x
  2. Step 2: Convert to fraction form
    2,791/4,187.18 = 843.22/x
  3. Step 3: Cross multiply
    2,791x = 4,187.18 × 843.22
  4. Step 4: Simplify right side
    2,791x = 3,530,713.92
  5. Step 5: Solve for x
    x = 3,530,713.92/2,791
  6. Step 6: Final answer
    x = 1,265.04

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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.