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Finding the Fourth Proportional to 2,728.97, 4,093.11 and 879.89

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Solution

The fourth proportional to 2,728.97, 4,093.11 and 879.89 is: 1,319.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728.97 : 4,093.11 = 879.89 : x
  2. Step 2: Convert to fraction form
    2,728.97/4,093.11 = 879.89/x
  3. Step 3: Cross multiply
    2,728.97x = 4,093.11 × 879.89
  4. Step 4: Simplify right side
    2,728.97x = 3,601,475.13
  5. Step 5: Solve for x
    x = 3,601,475.13/2,728.97
  6. Step 6: Final answer
    x = 1,319.72

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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.