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Finding the Fourth Proportional to 663.23, 994.99 and 218.51

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Solution

The fourth proportional to 663.23, 994.99 and 218.51 is: 327.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.23 : 994.99 = 218.51 : x
  2. Step 2: Convert to fraction form
    663.23/994.99 = 218.51/x
  3. Step 3: Cross multiply
    663.23x = 994.99 × 218.51
  4. Step 4: Simplify right side
    663.23x = 217,414.17
  5. Step 5: Solve for x
    x = 217,414.17/663.23
  6. Step 6: Final answer
    x = 327.81

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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.