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Finding the Third Proportional to 290.81 and 629.44

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Solution

The third proportional to 290.81 and 629.44 is: 1,362.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.81 : 629.44 = 629.44 : x
  2. Step 2: Convert to fraction form
    290.81/629.44 = 629.44/x
  3. Step 3: Cross multiply
    290.81x = 629.44 × 629.44
  4. Step 4: Simplify right side
    290.81x = 396,191.57
  5. Step 5: Solve for x
    x = 396,191.57/290.81
  6. Step 6: Final answer
    x = 1,362.36

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.