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Finding the Fourth Proportional to 236.21, 321.82 and 231.21

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Solution

The fourth proportional to 236.21, 321.82 and 231.21 is: 315.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.21 : 321.82 = 231.21 : x
  2. Step 2: Convert to fraction form
    236.21/321.82 = 231.21/x
  3. Step 3: Cross multiply
    236.21x = 321.82 × 231.21
  4. Step 4: Simplify right side
    236.21x = 74,407.42
  5. Step 5: Solve for x
    x = 74,407.42/236.21
  6. Step 6: Final answer
    x = 315.01

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.