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Finding the Fourth Proportional to 236.85, 326.79 and 143.65

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Solution

The fourth proportional to 236.85, 326.79 and 143.65 is: 198.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.85 : 326.79 = 143.65 : x
  2. Step 2: Convert to fraction form
    236.85/326.79 = 143.65/x
  3. Step 3: Cross multiply
    236.85x = 326.79 × 143.65
  4. Step 4: Simplify right side
    236.85x = 46,943.38
  5. Step 5: Solve for x
    x = 46,943.38/236.85
  6. Step 6: Final answer
    x = 198.20

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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.