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Finding the Fourth Proportional to 322.73, 445.30 and 191.78

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Solution

The fourth proportional to 322.73, 445.30 and 191.78 is: 264.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.73 : 445.30 = 191.78 : x
  2. Step 2: Convert to fraction form
    322.73/445.30 = 191.78/x
  3. Step 3: Cross multiply
    322.73x = 445.30 × 191.78
  4. Step 4: Simplify right side
    322.73x = 85,396.93
  5. Step 5: Solve for x
    x = 85,396.93/322.73
  6. Step 6: Final answer
    x = 264.61

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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.