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Finding the Third Proportional to 290.06 and 629.63

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Solution

The third proportional to 290.06 and 629.63 is: 1,366.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.06 : 629.63 = 629.63 : x
  2. Step 2: Convert to fraction form
    290.06/629.63 = 629.63/x
  3. Step 3: Cross multiply
    290.06x = 629.63 × 629.63
  4. Step 4: Simplify right side
    290.06x = 396,427.64
  5. Step 5: Solve for x
    x = 396,427.64/290.06
  6. Step 6: Final answer
    x = 1,366.70

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.