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Finding the Fourth Proportional to 396.54, 595.20 and 191.22

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Solution

The fourth proportional to 396.54, 595.20 and 191.22 is: 287.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.54 : 595.20 = 191.22 : x
  2. Step 2: Convert to fraction form
    396.54/595.20 = 191.22/x
  3. Step 3: Cross multiply
    396.54x = 595.20 × 191.22
  4. Step 4: Simplify right side
    396.54x = 113,814.14
  5. Step 5: Solve for x
    x = 113,814.14/396.54
  6. Step 6: Final answer
    x = 287.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.