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Finding the Fourth Proportional to 236.62, 326.55 and 138.40

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Solution

The fourth proportional to 236.62, 326.55 and 138.40 is: 191.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.62 : 326.55 = 138.40 : x
  2. Step 2: Convert to fraction form
    236.62/326.55 = 138.40/x
  3. Step 3: Cross multiply
    236.62x = 326.55 × 138.40
  4. Step 4: Simplify right side
    236.62x = 45,194.52
  5. Step 5: Solve for x
    x = 45,194.52/236.62
  6. Step 6: Final answer
    x = 191.00

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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.