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Finding the Fourth Proportional to 236.22, 353.73 and 213

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Solution

The fourth proportional to 236.22, 353.73 and 213 is: 318.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.22 : 353.73 = 213 : x
  2. Step 2: Convert to fraction form
    236.22/353.73 = 213/x
  3. Step 3: Cross multiply
    236.22x = 353.73 × 213
  4. Step 4: Simplify right side
    236.22x = 75,344.49
  5. Step 5: Solve for x
    x = 75,344.49/236.22
  6. Step 6: Final answer
    x = 318.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.