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Finding the Fourth Proportional to 2,791.68, 4,162.56 and 2,787.84

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Solution

The fourth proportional to 2,791.68, 4,162.56 and 2,787.84 is: 4,156.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791.68 : 4,162.56 = 2,787.84 : x
  2. Step 2: Convert to fraction form
    2,791.68/4,162.56 = 2,787.84/x
  3. Step 3: Cross multiply
    2,791.68x = 4,162.56 × 2,787.84
  4. Step 4: Simplify right side
    2,791.68x = 11,604,551.27
  5. Step 5: Solve for x
    x = 11,604,551.27/2,791.68
  6. Step 6: Final answer
    x = 4,156.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.