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Finding the Fourth Proportional to 180.72, 270.84 and 157.68

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Solution

The fourth proportional to 180.72, 270.84 and 157.68 is: 236.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.72 : 270.84 = 157.68 : x
  2. Step 2: Convert to fraction form
    180.72/270.84 = 157.68/x
  3. Step 3: Cross multiply
    180.72x = 270.84 × 157.68
  4. Step 4: Simplify right side
    180.72x = 42,706.05
  5. Step 5: Solve for x
    x = 42,706.05/180.72
  6. Step 6: Final answer
    x = 236.31

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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.