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Finding the Third Proportional to 290,660 and 627,180

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Solution

The third proportional to 290,660 and 627,180 is: 1,353,315.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,660 : 627,180 = 627,180 : x
  2. Step 2: Convert to fraction form
    290,660/627,180 = 627,180/x
  3. Step 3: Cross multiply
    290,660x = 627,180 × 627,180
  4. Step 4: Simplify right side
    290,660x = 393,354,752,400
  5. Step 5: Solve for x
    x = 393,354,752,400/290,660
  6. Step 6: Final answer
    x = 1,353,315.74

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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.