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Finding the Fourth Proportional to 396.70, 594.38 and 280.58

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Solution

The fourth proportional to 396.70, 594.38 and 280.58 is: 420.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.70 : 594.38 = 280.58 : x
  2. Step 2: Convert to fraction form
    396.70/594.38 = 280.58/x
  3. Step 3: Cross multiply
    396.70x = 594.38 × 280.58
  4. Step 4: Simplify right side
    396.70x = 166,768.87
  5. Step 5: Solve for x
    x = 166,768.87/396.70
  6. Step 6: Final answer
    x = 420.39

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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.