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Finding the Fourth Proportional to 2,791.31, 4,187.16 and 843.66

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Solution

The fourth proportional to 2,791.31, 4,187.16 and 843.66 is: 1,265.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791.31 : 4,187.16 = 843.66 : x
  2. Step 2: Convert to fraction form
    2,791.31/4,187.16 = 843.66/x
  3. Step 3: Cross multiply
    2,791.31x = 4,187.16 × 843.66
  4. Step 4: Simplify right side
    2,791.31x = 3,532,539.41
  5. Step 5: Solve for x
    x = 3,532,539.41/2,791.31
  6. Step 6: Final answer
    x = 1,265.55

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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.