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Finding the Fourth Proportional to 188.55, 281.39 and 168.05

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Solution

The fourth proportional to 188.55, 281.39 and 168.05 is: 250.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.55 : 281.39 = 168.05 : x
  2. Step 2: Convert to fraction form
    188.55/281.39 = 168.05/x
  3. Step 3: Cross multiply
    188.55x = 281.39 × 168.05
  4. Step 4: Simplify right side
    188.55x = 47,287.61
  5. Step 5: Solve for x
    x = 47,287.61/188.55
  6. Step 6: Final answer
    x = 250.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.