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Finding the Fourth Proportional to 236.65, 326.49 and 143.36

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Solution

The fourth proportional to 236.65, 326.49 and 143.36 is: 197.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.65 : 326.49 = 143.36 : x
  2. Step 2: Convert to fraction form
    236.65/326.49 = 143.36/x
  3. Step 3: Cross multiply
    236.65x = 326.49 × 143.36
  4. Step 4: Simplify right side
    236.65x = 46,805.34
  5. Step 5: Solve for x
    x = 46,805.34/236.65
  6. Step 6: Final answer
    x = 197.78

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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.