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Finding the Fourth Proportional to 409.38, 613.49 and 178.09

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Solution

The fourth proportional to 409.38, 613.49 and 178.09 is: 266.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.38 : 613.49 = 178.09 : x
  2. Step 2: Convert to fraction form
    409.38/613.49 = 178.09/x
  3. Step 3: Cross multiply
    409.38x = 613.49 × 178.09
  4. Step 4: Simplify right side
    409.38x = 109,255.54
  5. Step 5: Solve for x
    x = 109,255.54/409.38
  6. Step 6: Final answer
    x = 266.88

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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.