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Finding the Fourth Proportional to 331.91, 494.74 and 326.44

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Solution

The fourth proportional to 331.91, 494.74 and 326.44 is: 486.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.91 : 494.74 = 326.44 : x
  2. Step 2: Convert to fraction form
    331.91/494.74 = 326.44/x
  3. Step 3: Cross multiply
    331.91x = 494.74 × 326.44
  4. Step 4: Simplify right side
    331.91x = 161,503.95
  5. Step 5: Solve for x
    x = 161,503.95/331.91
  6. Step 6: Final answer
    x = 486.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.