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Finding the Fourth Proportional to 236.39, 326.16 and 143.15

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Solution

The fourth proportional to 236.39, 326.16 and 143.15 is: 197.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.39 : 326.16 = 143.15 : x
  2. Step 2: Convert to fraction form
    236.39/326.16 = 143.15/x
  3. Step 3: Cross multiply
    236.39x = 326.16 × 143.15
  4. Step 4: Simplify right side
    236.39x = 46,689.09
  5. Step 5: Solve for x
    x = 46,689.09/236.39
  6. Step 6: Final answer
    x = 197.51

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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.