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Finding the Fourth Proportional to 2,279, 3,144.30 and 1,394.36

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Solution

The fourth proportional to 2,279, 3,144.30 and 1,394.36 is: 1,923.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279 : 3,144.30 = 1,394.36 : x
  2. Step 2: Convert to fraction form
    2,279/3,144.30 = 1,394.36/x
  3. Step 3: Cross multiply
    2,279x = 3,144.30 × 1,394.36
  4. Step 4: Simplify right side
    2,279x = 4,384,286.15
  5. Step 5: Solve for x
    x = 4,384,286.15/2,279
  6. Step 6: Final answer
    x = 1,923.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.