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Finding the Fourth Proportional to 326.67, 490.32 and 196.80

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Solution

The fourth proportional to 326.67, 490.32 and 196.80 is: 295.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.67 : 490.32 = 196.80 : x
  2. Step 2: Convert to fraction form
    326.67/490.32 = 196.80/x
  3. Step 3: Cross multiply
    326.67x = 490.32 × 196.80
  4. Step 4: Simplify right side
    326.67x = 96,494.98
  5. Step 5: Solve for x
    x = 96,494.98/326.67
  6. Step 6: Final answer
    x = 295.39

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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.