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Finding the Fourth Proportional to 268.31, 369.92 and 231.39

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Solution

The fourth proportional to 268.31, 369.92 and 231.39 is: 319.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.31 : 369.92 = 231.39 : x
  2. Step 2: Convert to fraction form
    268.31/369.92 = 231.39/x
  3. Step 3: Cross multiply
    268.31x = 369.92 × 231.39
  4. Step 4: Simplify right side
    268.31x = 85,594.63
  5. Step 5: Solve for x
    x = 85,594.63/268.31
  6. Step 6: Final answer
    x = 319.02

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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.