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Finding the Fourth Proportional to 396.35, 594.56 and 103.85

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Solution

The fourth proportional to 396.35, 594.56 and 103.85 is: 155.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.35 : 594.56 = 103.85 : x
  2. Step 2: Convert to fraction form
    396.35/594.56 = 103.85/x
  3. Step 3: Cross multiply
    396.35x = 594.56 × 103.85
  4. Step 4: Simplify right side
    396.35x = 61,747.37
  5. Step 5: Solve for x
    x = 61,747.37/396.35
  6. Step 6: Final answer
    x = 155.79

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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.