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Finding the Fourth Proportional to 396.72, 595.28 and 214.10

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Solution

The fourth proportional to 396.72, 595.28 and 214.10 is: 321.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.72 : 595.28 = 214.10 : x
  2. Step 2: Convert to fraction form
    396.72/595.28 = 214.10/x
  3. Step 3: Cross multiply
    396.72x = 595.28 × 214.10
  4. Step 4: Simplify right side
    396.72x = 127,445.40
  5. Step 5: Solve for x
    x = 127,445.40/396.72
  6. Step 6: Final answer
    x = 321.25

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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.