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Finding the Fourth Proportional to 2,273.92, 3,138 and 1,279.42

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Solution

The fourth proportional to 2,273.92, 3,138 and 1,279.42 is: 1,765.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,273.92 : 3,138 = 1,279.42 : x
  2. Step 2: Convert to fraction form
    2,273.92/3,138 = 1,279.42/x
  3. Step 3: Cross multiply
    2,273.92x = 3,138 × 1,279.42
  4. Step 4: Simplify right side
    2,273.92x = 4,014,819.96
  5. Step 5: Solve for x
    x = 4,014,819.96/2,273.92
  6. Step 6: Final answer
    x = 1,765.59

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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.