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Finding the Fourth Proportional to 408.03, 611.96 and 185.69

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Solution

The fourth proportional to 408.03, 611.96 and 185.69 is: 278.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.03 : 611.96 = 185.69 : x
  2. Step 2: Convert to fraction form
    408.03/611.96 = 185.69/x
  3. Step 3: Cross multiply
    408.03x = 611.96 × 185.69
  4. Step 4: Simplify right side
    408.03x = 113,630.86
  5. Step 5: Solve for x
    x = 113,630.86/408.03
  6. Step 6: Final answer
    x = 278.49

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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.