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Finding the Fourth Proportional to 236.49, 326.24 and 138.18

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Solution

The fourth proportional to 236.49, 326.24 and 138.18 is: 190.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.49 : 326.24 = 138.18 : x
  2. Step 2: Convert to fraction form
    236.49/326.24 = 138.18/x
  3. Step 3: Cross multiply
    236.49x = 326.24 × 138.18
  4. Step 4: Simplify right side
    236.49x = 45,079.84
  5. Step 5: Solve for x
    x = 45,079.84/236.49
  6. Step 6: Final answer
    x = 190.62

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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.