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Finding the Fourth Proportional to 396.89, 595.38 and 286.22

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Solution

The fourth proportional to 396.89, 595.38 and 286.22 is: 429.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.89 : 595.38 = 286.22 : x
  2. Step 2: Convert to fraction form
    396.89/595.38 = 286.22/x
  3. Step 3: Cross multiply
    396.89x = 595.38 × 286.22
  4. Step 4: Simplify right side
    396.89x = 170,406.69
  5. Step 5: Solve for x
    x = 170,406.69/396.89
  6. Step 6: Final answer
    x = 429.36

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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.