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Finding the Third Proportional to 338.44 and 477.09

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Solution

The third proportional to 338.44 and 477.09 is: 672.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.44 : 477.09 = 477.09 : x
  2. Step 2: Convert to fraction form
    338.44/477.09 = 477.09/x
  3. Step 3: Cross multiply
    338.44x = 477.09 × 477.09
  4. Step 4: Simplify right side
    338.44x = 227,618.45
  5. Step 5: Solve for x
    x = 227,618.45/338.44
  6. Step 6: Final answer
    x = 672.56

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.