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Finding the Third Proportional to 819.50 and 1,919.75

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Solution

The third proportional to 819.50 and 1,919.75 is: 4,497.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.50 : 1,919.75 = 1,919.75 : x
  2. Step 2: Convert to fraction form
    819.50/1,919.75 = 1,919.75/x
  3. Step 3: Cross multiply
    819.50x = 1,919.75 × 1,919.75
  4. Step 4: Simplify right side
    819.50x = 3,685,440.06
  5. Step 5: Solve for x
    x = 3,685,440.06/819.50
  6. Step 6: Final answer
    x = 4,497.18

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.