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Finding the Fourth Proportional to 326.38, 450.33 and 221.48

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Solution

The fourth proportional to 326.38, 450.33 and 221.48 is: 305.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.38 : 450.33 = 221.48 : x
  2. Step 2: Convert to fraction form
    326.38/450.33 = 221.48/x
  3. Step 3: Cross multiply
    326.38x = 450.33 × 221.48
  4. Step 4: Simplify right side
    326.38x = 99,739.09
  5. Step 5: Solve for x
    x = 99,739.09/326.38
  6. Step 6: Final answer
    x = 305.59

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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.