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Finding the Fourth Proportional to 236.66, 326.57 and 138.41

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Solution

The fourth proportional to 236.66, 326.57 and 138.41 is: 190.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.66 : 326.57 = 138.41 : x
  2. Step 2: Convert to fraction form
    236.66/326.57 = 138.41/x
  3. Step 3: Cross multiply
    236.66x = 326.57 × 138.41
  4. Step 4: Simplify right side
    236.66x = 45,199.86
  5. Step 5: Solve for x
    x = 45,199.86/236.66
  6. Step 6: Final answer
    x = 190.99

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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.