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Finding the Third Proportional to 100,947 and 218,615

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Solution

The third proportional to 100,947 and 218,615 is: 473,441.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,947 : 218,615 = 218,615 : x
  2. Step 2: Convert to fraction form
    100,947/218,615 = 218,615/x
  3. Step 3: Cross multiply
    100,947x = 218,615 × 218,615
  4. Step 4: Simplify right side
    100,947x = 47,792,518,225
  5. Step 5: Solve for x
    x = 47,792,518,225/100,947
  6. Step 6: Final answer
    x = 473,441.69

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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.