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Finding the Fourth Proportional to 236.89, 353.26 and 215.43

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Solution

The fourth proportional to 236.89, 353.26 and 215.43 is: 321.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.89 : 353.26 = 215.43 : x
  2. Step 2: Convert to fraction form
    236.89/353.26 = 215.43/x
  3. Step 3: Cross multiply
    236.89x = 353.26 × 215.43
  4. Step 4: Simplify right side
    236.89x = 76,102.80
  5. Step 5: Solve for x
    x = 76,102.80/236.89
  6. Step 6: Final answer
    x = 321.26

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.