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Finding the Fourth Proportional to 180.96, 270.30 and 171.78

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Solution

The fourth proportional to 180.96, 270.30 and 171.78 is: 256.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.96 : 270.30 = 171.78 : x
  2. Step 2: Convert to fraction form
    180.96/270.30 = 171.78/x
  3. Step 3: Cross multiply
    180.96x = 270.30 × 171.78
  4. Step 4: Simplify right side
    180.96x = 46,432.13
  5. Step 5: Solve for x
    x = 46,432.13/180.96
  6. Step 6: Final answer
    x = 256.59

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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.