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Finding the Fourth Proportional to 236.79, 326.49 and 153.78

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Solution

The fourth proportional to 236.79, 326.49 and 153.78 is: 212.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.79 : 326.49 = 153.78 : x
  2. Step 2: Convert to fraction form
    236.79/326.49 = 153.78/x
  3. Step 3: Cross multiply
    236.79x = 326.49 × 153.78
  4. Step 4: Simplify right side
    236.79x = 50,207.63
  5. Step 5: Solve for x
    x = 50,207.63/236.79
  6. Step 6: Final answer
    x = 212.03

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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.