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Finding the Fourth Proportional to 396.99, 595.31 and 191.66

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Solution

The fourth proportional to 396.99, 595.31 and 191.66 is: 287.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.99 : 595.31 = 191.66 : x
  2. Step 2: Convert to fraction form
    396.99/595.31 = 191.66/x
  3. Step 3: Cross multiply
    396.99x = 595.31 × 191.66
  4. Step 4: Simplify right side
    396.99x = 114,093.18
  5. Step 5: Solve for x
    x = 114,093.18/396.99
  6. Step 6: Final answer
    x = 287.40

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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.