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Finding the Fourth Proportional to 663.94, 996.15 and 231.22

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Solution

The fourth proportional to 663.94, 996.15 and 231.22 is: 346.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.94 : 996.15 = 231.22 : x
  2. Step 2: Convert to fraction form
    663.94/996.15 = 231.22/x
  3. Step 3: Cross multiply
    663.94x = 996.15 × 231.22
  4. Step 4: Simplify right side
    663.94x = 230,329.80
  5. Step 5: Solve for x
    x = 230,329.80/663.94
  6. Step 6: Final answer
    x = 346.91

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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.