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Finding the Fourth Proportional to 2,873.76, 3,965.78 and 1,631.76

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Solution

The fourth proportional to 2,873.76, 3,965.78 and 1,631.76 is: 2,251.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,873.76 : 3,965.78 = 1,631.76 : x
  2. Step 2: Convert to fraction form
    2,873.76/3,965.78 = 1,631.76/x
  3. Step 3: Cross multiply
    2,873.76x = 3,965.78 × 1,631.76
  4. Step 4: Simplify right side
    2,873.76x = 6,471,201.17
  5. Step 5: Solve for x
    x = 6,471,201.17/2,873.76
  6. Step 6: Final answer
    x = 2,251.82

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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.