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Finding the Fourth Proportional to 396.84, 595.78 and 342.70

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Solution

The fourth proportional to 396.84, 595.78 and 342.70 is: 514.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.84 : 595.78 = 342.70 : x
  2. Step 2: Convert to fraction form
    396.84/595.78 = 342.70/x
  3. Step 3: Cross multiply
    396.84x = 595.78 × 342.70
  4. Step 4: Simplify right side
    396.84x = 204,173.81
  5. Step 5: Solve for x
    x = 204,173.81/396.84
  6. Step 6: Final answer
    x = 514.50

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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.