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Finding the Fourth Proportional to 180.90, 270.81 and 178.88

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Solution

The fourth proportional to 180.90, 270.81 and 178.88 is: 267.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.90 : 270.81 = 178.88 : x
  2. Step 2: Convert to fraction form
    180.90/270.81 = 178.88/x
  3. Step 3: Cross multiply
    180.90x = 270.81 × 178.88
  4. Step 4: Simplify right side
    180.90x = 48,441.14
  5. Step 5: Solve for x
    x = 48,441.14/180.90
  6. Step 6: Final answer
    x = 267.78

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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.