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Finding the Fourth Proportional to 396.14, 594.48 and 139.64

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Solution

The fourth proportional to 396.14, 594.48 and 139.64 is: 209.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.14 : 594.48 = 139.64 : x
  2. Step 2: Convert to fraction form
    396.14/594.48 = 139.64/x
  3. Step 3: Cross multiply
    396.14x = 594.48 × 139.64
  4. Step 4: Simplify right side
    396.14x = 83,013.69
  5. Step 5: Solve for x
    x = 83,013.69/396.14
  6. Step 6: Final answer
    x = 209.56

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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.