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Finding the Fourth Proportional to 185.46, 255.45 and 159.15

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Solution

The fourth proportional to 185.46, 255.45 and 159.15 is: 219.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.46 : 255.45 = 159.15 : x
  2. Step 2: Convert to fraction form
    185.46/255.45 = 159.15/x
  3. Step 3: Cross multiply
    185.46x = 255.45 × 159.15
  4. Step 4: Simplify right side
    185.46x = 40,654.87
  5. Step 5: Solve for x
    x = 40,654.87/185.46
  6. Step 6: Final answer
    x = 219.21

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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.