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Finding the Fourth Proportional to 2,791.77, 3,877.89 and 2,747.11

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Solution

The fourth proportional to 2,791.77, 3,877.89 and 2,747.11 is: 3,815.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791.77 : 3,877.89 = 2,747.11 : x
  2. Step 2: Convert to fraction form
    2,791.77/3,877.89 = 2,747.11/x
  3. Step 3: Cross multiply
    2,791.77x = 3,877.89 × 2,747.11
  4. Step 4: Simplify right side
    2,791.77x = 10,652,990.40
  5. Step 5: Solve for x
    x = 10,652,990.40/2,791.77
  6. Step 6: Final answer
    x = 3,815.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.