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Finding the Fourth Proportional to 236.93, 326.98 and 138.70

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Solution

The fourth proportional to 236.93, 326.98 and 138.70 is: 191.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.93 : 326.98 = 138.70 : x
  2. Step 2: Convert to fraction form
    236.93/326.98 = 138.70/x
  3. Step 3: Cross multiply
    236.93x = 326.98 × 138.70
  4. Step 4: Simplify right side
    236.93x = 45,352.13
  5. Step 5: Solve for x
    x = 45,352.13/236.93
  6. Step 6: Final answer
    x = 191.42

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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.