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Finding the Fourth Proportional to 236.78, 326.68 and 143.56

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Solution

The fourth proportional to 236.78, 326.68 and 143.56 is: 198.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.78 : 326.68 = 143.56 : x
  2. Step 2: Convert to fraction form
    236.78/326.68 = 143.56/x
  3. Step 3: Cross multiply
    236.78x = 326.68 × 143.56
  4. Step 4: Simplify right side
    236.78x = 46,898.18
  5. Step 5: Solve for x
    x = 46,898.18/236.78
  6. Step 6: Final answer
    x = 198.07

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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.