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Finding the Fourth Proportional to 268.24, 400.40 and 231.76

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Solution

The fourth proportional to 268.24, 400.40 and 231.76 is: 345.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.24 : 400.40 = 231.76 : x
  2. Step 2: Convert to fraction form
    268.24/400.40 = 231.76/x
  3. Step 3: Cross multiply
    268.24x = 400.40 × 231.76
  4. Step 4: Simplify right side
    268.24x = 92,796.70
  5. Step 5: Solve for x
    x = 92,796.70/268.24
  6. Step 6: Final answer
    x = 345.95

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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.