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Finding the Third Proportional to 401.44 and 636.19

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Solution

The third proportional to 401.44 and 636.19 is: 1,008.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.44 : 636.19 = 636.19 : x
  2. Step 2: Convert to fraction form
    401.44/636.19 = 636.19/x
  3. Step 3: Cross multiply
    401.44x = 636.19 × 636.19
  4. Step 4: Simplify right side
    401.44x = 404,734.54
  5. Step 5: Solve for x
    x = 404,734.54/401.44
  6. Step 6: Final answer
    x = 1,008.21

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.