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Finding the Fourth Proportional to 180.63, 270.44 and 129.09

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Solution

The fourth proportional to 180.63, 270.44 and 129.09 is: 193.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.63 : 270.44 = 129.09 : x
  2. Step 2: Convert to fraction form
    180.63/270.44 = 129.09/x
  3. Step 3: Cross multiply
    180.63x = 270.44 × 129.09
  4. Step 4: Simplify right side
    180.63x = 34,911.95
  5. Step 5: Solve for x
    x = 34,911.95/180.63
  6. Step 6: Final answer
    x = 193.28

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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.