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Finding the Fourth Proportional to 408.04, 611.85 and 161.09

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Solution

The fourth proportional to 408.04, 611.85 and 161.09 is: 241.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.04 : 611.85 = 161.09 : x
  2. Step 2: Convert to fraction form
    408.04/611.85 = 161.09/x
  3. Step 3: Cross multiply
    408.04x = 611.85 × 161.09
  4. Step 4: Simplify right side
    408.04x = 98,562.76
  5. Step 5: Solve for x
    x = 98,562.76/408.04
  6. Step 6: Final answer
    x = 241.55

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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.