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Finding the Fourth Proportional to 180.36, 270.01 and 115.43

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Solution

The fourth proportional to 180.36, 270.01 and 115.43 is: 172.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.36 : 270.01 = 115.43 : x
  2. Step 2: Convert to fraction form
    180.36/270.01 = 115.43/x
  3. Step 3: Cross multiply
    180.36x = 270.01 × 115.43
  4. Step 4: Simplify right side
    180.36x = 31,167.25
  5. Step 5: Solve for x
    x = 31,167.25/180.36
  6. Step 6: Final answer
    x = 172.81

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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.