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Finding the Fourth Proportional to 2,195.82, 3,293.93 and 809.17

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Solution

The fourth proportional to 2,195.82, 3,293.93 and 809.17 is: 1,213.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,195.82 : 3,293.93 = 809.17 : x
  2. Step 2: Convert to fraction form
    2,195.82/3,293.93 = 809.17/x
  3. Step 3: Cross multiply
    2,195.82x = 3,293.93 × 809.17
  4. Step 4: Simplify right side
    2,195.82x = 2,665,343.13
  5. Step 5: Solve for x
    x = 2,665,343.13/2,195.82
  6. Step 6: Final answer
    x = 1,213.83

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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.