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Finding the Fourth Proportional to 2,728.12, 4,092.08 and 879.38

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Solution

The fourth proportional to 2,728.12, 4,092.08 and 879.38 is: 1,319.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728.12 : 4,092.08 = 879.38 : x
  2. Step 2: Convert to fraction form
    2,728.12/4,092.08 = 879.38/x
  3. Step 3: Cross multiply
    2,728.12x = 4,092.08 × 879.38
  4. Step 4: Simplify right side
    2,728.12x = 3,598,493.31
  5. Step 5: Solve for x
    x = 3,598,493.31/2,728.12
  6. Step 6: Final answer
    x = 1,319.04

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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.