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Finding the Third Proportional to 99,438 and 216,366

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Solution

The third proportional to 99,438 and 216,366 is: 470,788.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,438 : 216,366 = 216,366 : x
  2. Step 2: Convert to fraction form
    99,438/216,366 = 216,366/x
  3. Step 3: Cross multiply
    99,438x = 216,366 × 216,366
  4. Step 4: Simplify right side
    99,438x = 46,814,245,956
  5. Step 5: Solve for x
    x = 46,814,245,956/99,438
  6. Step 6: Final answer
    x = 470,788.29

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.