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Finding the Fourth Proportional to 2,791.46, 4,187.12 and 843.68

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Solution

The fourth proportional to 2,791.46, 4,187.12 and 843.68 is: 1,265.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791.46 : 4,187.12 = 843.68 : x
  2. Step 2: Convert to fraction form
    2,791.46/4,187.12 = 843.68/x
  3. Step 3: Cross multiply
    2,791.46x = 4,187.12 × 843.68
  4. Step 4: Simplify right side
    2,791.46x = 3,532,589.40
  5. Step 5: Solve for x
    x = 3,532,589.40/2,791.46
  6. Step 6: Final answer
    x = 1,265.50

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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.