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Finding the Fourth Proportional to 2,879.36, 3,963.91 and 2,747.11

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Solution

The fourth proportional to 2,879.36, 3,963.91 and 2,747.11 is: 3,781.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.36 : 3,963.91 = 2,747.11 : x
  2. Step 2: Convert to fraction form
    2,879.36/3,963.91 = 2,747.11/x
  3. Step 3: Cross multiply
    2,879.36x = 3,963.91 × 2,747.11
  4. Step 4: Simplify right side
    2,879.36x = 10,889,296.80
  5. Step 5: Solve for x
    x = 10,889,296.80/2,879.36
  6. Step 6: Final answer
    x = 3,781.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.