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Finding the Fourth Proportional to 236.51, 326.40 and 138.32

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Solution

The fourth proportional to 236.51, 326.40 and 138.32 is: 190.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.51 : 326.40 = 138.32 : x
  2. Step 2: Convert to fraction form
    236.51/326.40 = 138.32/x
  3. Step 3: Cross multiply
    236.51x = 326.40 × 138.32
  4. Step 4: Simplify right side
    236.51x = 45,147.65
  5. Step 5: Solve for x
    x = 45,147.65/236.51
  6. Step 6: Final answer
    x = 190.90

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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.