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Finding the Fourth Proportional to 396.95, 595.40 and 136.84

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Solution

The fourth proportional to 396.95, 595.40 and 136.84 is: 205.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.95 : 595.40 = 136.84 : x
  2. Step 2: Convert to fraction form
    396.95/595.40 = 136.84/x
  3. Step 3: Cross multiply
    396.95x = 595.40 × 136.84
  4. Step 4: Simplify right side
    396.95x = 81,474.25
  5. Step 5: Solve for x
    x = 81,474.25/396.95
  6. Step 6: Final answer
    x = 205.25

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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.