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Finding the Fourth Proportional to 2,138.70, 3,202.92 and 1,095.96

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Solution

The fourth proportional to 2,138.70, 3,202.92 and 1,095.96 is: 1,641.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.70 : 3,202.92 = 1,095.96 : x
  2. Step 2: Convert to fraction form
    2,138.70/3,202.92 = 1,095.96/x
  3. Step 3: Cross multiply
    2,138.70x = 3,202.92 × 1,095.96
  4. Step 4: Simplify right side
    2,138.70x = 3,510,272.20
  5. Step 5: Solve for x
    x = 3,510,272.20/2,138.70
  6. Step 6: Final answer
    x = 1,641.31

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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.