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Finding the Third Proportional to 99,218 and 215,212

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Solution

The third proportional to 99,218 and 215,212 is: 466,812.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,218 : 215,212 = 215,212 : x
  2. Step 2: Convert to fraction form
    99,218/215,212 = 215,212/x
  3. Step 3: Cross multiply
    99,218x = 215,212 × 215,212
  4. Step 4: Simplify right side
    99,218x = 46,316,204,944
  5. Step 5: Solve for x
    x = 46,316,204,944/99,218
  6. Step 6: Final answer
    x = 466,812.52

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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.