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Finding the Fourth Proportional to 396.09, 591.28 and 334.65

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Solution

The fourth proportional to 396.09, 591.28 and 334.65 is: 499.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.09 : 591.28 = 334.65 : x
  2. Step 2: Convert to fraction form
    396.09/591.28 = 334.65/x
  3. Step 3: Cross multiply
    396.09x = 591.28 × 334.65
  4. Step 4: Simplify right side
    396.09x = 197,871.02
  5. Step 5: Solve for x
    x = 197,871.02/396.09
  6. Step 6: Final answer
    x = 499.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.