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Finding the Fourth Proportional to 396.42, 594.62 and 107.85

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Solution

The fourth proportional to 396.42, 594.62 and 107.85 is: 161.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.42 : 594.62 = 107.85 : x
  2. Step 2: Convert to fraction form
    396.42/594.62 = 107.85/x
  3. Step 3: Cross multiply
    396.42x = 594.62 × 107.85
  4. Step 4: Simplify right side
    396.42x = 64,131.52
  5. Step 5: Solve for x
    x = 64,131.52/396.42
  6. Step 6: Final answer
    x = 161.78

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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.