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Finding the Fourth Proportional to 268.80, 370.82 and 231.95

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Solution

The fourth proportional to 268.80, 370.82 and 231.95 is: 319.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.80 : 370.82 = 231.95 : x
  2. Step 2: Convert to fraction form
    268.80/370.82 = 231.95/x
  3. Step 3: Cross multiply
    268.80x = 370.82 × 231.95
  4. Step 4: Simplify right side
    268.80x = 86,008.69
  5. Step 5: Solve for x
    x = 86,008.69/268.80
  6. Step 6: Final answer
    x = 319.97

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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.