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Finding the Fourth Proportional to 396.02, 594.20 and 203.78

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Solution

The fourth proportional to 396.02, 594.20 and 203.78 is: 305.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.02 : 594.20 = 203.78 : x
  2. Step 2: Convert to fraction form
    396.02/594.20 = 203.78/x
  3. Step 3: Cross multiply
    396.02x = 594.20 × 203.78
  4. Step 4: Simplify right side
    396.02x = 121,086.08
  5. Step 5: Solve for x
    x = 121,086.08/396.02
  6. Step 6: Final answer
    x = 305.76

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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.