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Finding the Fourth Proportional to 331.74, 458.38 and 326.34

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Solution

The fourth proportional to 331.74, 458.38 and 326.34 is: 450.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.74 : 458.38 = 326.34 : x
  2. Step 2: Convert to fraction form
    331.74/458.38 = 326.34/x
  3. Step 3: Cross multiply
    331.74x = 458.38 × 326.34
  4. Step 4: Simplify right side
    331.74x = 149,587.73
  5. Step 5: Solve for x
    x = 149,587.73/331.74
  6. Step 6: Final answer
    x = 450.92

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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.