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Finding the Fourth Proportional to 396.42, 595.44 and 385.08

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Solution

The fourth proportional to 396.42, 595.44 and 385.08 is: 578.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.42 : 595.44 = 385.08 : x
  2. Step 2: Convert to fraction form
    396.42/595.44 = 385.08/x
  3. Step 3: Cross multiply
    396.42x = 595.44 × 385.08
  4. Step 4: Simplify right side
    396.42x = 229,292.04
  5. Step 5: Solve for x
    x = 229,292.04/396.42
  6. Step 6: Final answer
    x = 578.41

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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.