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Finding the Fourth Proportional to 326.22, 447.51 and 308.57

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Solution

The fourth proportional to 326.22, 447.51 and 308.57 is: 423.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.22 : 447.51 = 308.57 : x
  2. Step 2: Convert to fraction form
    326.22/447.51 = 308.57/x
  3. Step 3: Cross multiply
    326.22x = 447.51 × 308.57
  4. Step 4: Simplify right side
    326.22x = 138,087.39
  5. Step 5: Solve for x
    x = 138,087.39/326.22
  6. Step 6: Final answer
    x = 423.29

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.