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Finding the Third Proportional to 1,218 and 2,628

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Solution

The third proportional to 1,218 and 2,628 is: 5,670.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218 : 2,628 = 2,628 : x
  2. Step 2: Convert to fraction form
    1,218/2,628 = 2,628/x
  3. Step 3: Cross multiply
    1,218x = 2,628 × 2,628
  4. Step 4: Simplify right side
    1,218x = 6,906,384
  5. Step 5: Solve for x
    x = 6,906,384/1,218
  6. Step 6: Final answer
    x = 5,670.27

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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.