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Finding the Fourth Proportional to 2,727.75, 4,092 and 878.25

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Solution

The fourth proportional to 2,727.75, 4,092 and 878.25 is: 1,317.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,727.75 : 4,092 = 878.25 : x
  2. Step 2: Convert to fraction form
    2,727.75/4,092 = 878.25/x
  3. Step 3: Cross multiply
    2,727.75x = 4,092 × 878.25
  4. Step 4: Simplify right side
    2,727.75x = 3,593,799
  5. Step 5: Solve for x
    x = 3,593,799/2,727.75
  6. Step 6: Final answer
    x = 1,317.50

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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.