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Finding the Fourth Proportional to 326.56, 450.39 and 195.55

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Solution

The fourth proportional to 326.56, 450.39 and 195.55 is: 269.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.56 : 450.39 = 195.55 : x
  2. Step 2: Convert to fraction form
    326.56/450.39 = 195.55/x
  3. Step 3: Cross multiply
    326.56x = 450.39 × 195.55
  4. Step 4: Simplify right side
    326.56x = 88,073.76
  5. Step 5: Solve for x
    x = 88,073.76/326.56
  6. Step 6: Final answer
    x = 269.70

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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.