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Finding the Third Proportional to 121,215 and 245,891

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Solution

The third proportional to 121,215 and 245,891 is: 498,802.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,215 : 245,891 = 245,891 : x
  2. Step 2: Convert to fraction form
    121,215/245,891 = 245,891/x
  3. Step 3: Cross multiply
    121,215x = 245,891 × 245,891
  4. Step 4: Simplify right side
    121,215x = 60,462,383,881
  5. Step 5: Solve for x
    x = 60,462,383,881/121,215
  6. Step 6: Final answer
    x = 498,802.82

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.