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Finding the Fourth Proportional to 236.42, 326.10 and 153.40

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Solution

The fourth proportional to 236.42, 326.10 and 153.40 is: 211.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.42 : 326.10 = 153.40 : x
  2. Step 2: Convert to fraction form
    236.42/326.10 = 153.40/x
  3. Step 3: Cross multiply
    236.42x = 326.10 × 153.40
  4. Step 4: Simplify right side
    236.42x = 50,023.74
  5. Step 5: Solve for x
    x = 50,023.74/236.42
  6. Step 6: Final answer
    x = 211.59

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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.