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Finding the Fourth Proportional to 322.73, 445.38 and 196.65

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Solution

The fourth proportional to 322.73, 445.38 and 196.65 is: 271.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.73 : 445.38 = 196.65 : x
  2. Step 2: Convert to fraction form
    322.73/445.38 = 196.65/x
  3. Step 3: Cross multiply
    322.73x = 445.38 × 196.65
  4. Step 4: Simplify right side
    322.73x = 87,583.98
  5. Step 5: Solve for x
    x = 87,583.98/322.73
  6. Step 6: Final answer
    x = 271.38

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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.