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Finding the Fourth Proportional to 2,879.64, 3,972.30 and 1,995.96

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Solution

The fourth proportional to 2,879.64, 3,972.30 and 1,995.96 is: 2,753.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.64 : 3,972.30 = 1,995.96 : x
  2. Step 2: Convert to fraction form
    2,879.64/3,972.30 = 1,995.96/x
  3. Step 3: Cross multiply
    2,879.64x = 3,972.30 × 1,995.96
  4. Step 4: Simplify right side
    2,879.64x = 7,928,551.91
  5. Step 5: Solve for x
    x = 7,928,551.91/2,879.64
  6. Step 6: Final answer
    x = 2,753.31

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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.