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Finding the Fourth Proportional to 185.43, 255.78 and 160.73

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Solution

The fourth proportional to 185.43, 255.78 and 160.73 is: 221.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.43 : 255.78 = 160.73 : x
  2. Step 2: Convert to fraction form
    185.43/255.78 = 160.73/x
  3. Step 3: Cross multiply
    185.43x = 255.78 × 160.73
  4. Step 4: Simplify right side
    185.43x = 41,110.24
  5. Step 5: Solve for x
    x = 41,110.24/185.43
  6. Step 6: Final answer
    x = 221.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.