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Finding the Fourth Proportional to 396.41, 591.48 and 328.37

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Solution

The fourth proportional to 396.41, 591.48 and 328.37 is: 489.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.41 : 591.48 = 328.37 : x
  2. Step 2: Convert to fraction form
    396.41/591.48 = 328.37/x
  3. Step 3: Cross multiply
    396.41x = 591.48 × 328.37
  4. Step 4: Simplify right side
    396.41x = 194,221.33
  5. Step 5: Solve for x
    x = 194,221.33/396.41
  6. Step 6: Final answer
    x = 489.96

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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.