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Finding the Fourth Proportional to 396.23, 595.44 and 213.75

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Solution

The fourth proportional to 396.23, 595.44 and 213.75 is: 321.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.23 : 595.44 = 213.75 : x
  2. Step 2: Convert to fraction form
    396.23/595.44 = 213.75/x
  3. Step 3: Cross multiply
    396.23x = 595.44 × 213.75
  4. Step 4: Simplify right side
    396.23x = 127,275.30
  5. Step 5: Solve for x
    x = 127,275.30/396.23
  6. Step 6: Final answer
    x = 321.22

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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.