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Finding the Fourth Proportional to 396.97, 548.43 and 304.09

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Solution

The fourth proportional to 396.97, 548.43 and 304.09 is: 420.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.97 : 548.43 = 304.09 : x
  2. Step 2: Convert to fraction form
    396.97/548.43 = 304.09/x
  3. Step 3: Cross multiply
    396.97x = 548.43 × 304.09
  4. Step 4: Simplify right side
    396.97x = 166,772.08
  5. Step 5: Solve for x
    x = 166,772.08/396.97
  6. Step 6: Final answer
    x = 420.11

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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.