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Finding the Fourth Proportional to 663.82, 996.12 and 231.28

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Solution

The fourth proportional to 663.82, 996.12 and 231.28 is: 347.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.82 : 996.12 = 231.28 : x
  2. Step 2: Convert to fraction form
    663.82/996.12 = 231.28/x
  3. Step 3: Cross multiply
    663.82x = 996.12 × 231.28
  4. Step 4: Simplify right side
    663.82x = 230,378.23
  5. Step 5: Solve for x
    x = 230,378.23/663.82
  6. Step 6: Final answer
    x = 347.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.