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Finding the Third Proportional to 128,728.50 and 283,635

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Solution

The third proportional to 128,728.50 and 283,635 is: 624,949.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,728.50 : 283,635 = 283,635 : x
  2. Step 2: Convert to fraction form
    128,728.50/283,635 = 283,635/x
  3. Step 3: Cross multiply
    128,728.50x = 283,635 × 283,635
  4. Step 4: Simplify right side
    128,728.50x = 80,448,813,225
  5. Step 5: Solve for x
    x = 80,448,813,225/128,728.50
  6. Step 6: Final answer
    x = 624,949.51

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.