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Finding the Third Proportional to 637.25 and 1,290.25

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Solution

The third proportional to 637.25 and 1,290.25 is: 2,612.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.25 : 1,290.25 = 1,290.25 : x
  2. Step 2: Convert to fraction form
    637.25/1,290.25 = 1,290.25/x
  3. Step 3: Cross multiply
    637.25x = 1,290.25 × 1,290.25
  4. Step 4: Simplify right side
    637.25x = 1,664,745.06
  5. Step 5: Solve for x
    x = 1,664,745.06/637.25
  6. Step 6: Final answer
    x = 2,612.39

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Why These Related Problems?

These problems maintain the same ratio (2.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.