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Finding the Fourth Proportional to 236.31, 326.09 and 131.39

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Solution

The fourth proportional to 236.31, 326.09 and 131.39 is: 181.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.31 : 326.09 = 131.39 : x
  2. Step 2: Convert to fraction form
    236.31/326.09 = 131.39/x
  3. Step 3: Cross multiply
    236.31x = 326.09 × 131.39
  4. Step 4: Simplify right side
    236.31x = 42,843.33
  5. Step 5: Solve for x
    x = 42,843.33/236.31
  6. Step 6: Final answer
    x = 181.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.