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Finding the Fourth Proportional to 481.23, 663.66 and 331.79

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Solution

The fourth proportional to 481.23, 663.66 and 331.79 is: 457.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.23 : 663.66 = 331.79 : x
  2. Step 2: Convert to fraction form
    481.23/663.66 = 331.79/x
  3. Step 3: Cross multiply
    481.23x = 663.66 × 331.79
  4. Step 4: Simplify right side
    481.23x = 220,192.43
  5. Step 5: Solve for x
    x = 220,192.43/481.23
  6. Step 6: Final answer
    x = 457.56

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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.