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Finding the Third Proportional to 393,635 and 815,275

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Solution

The third proportional to 393,635 and 815,275 is: 1,688,552.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,635 : 815,275 = 815,275 : x
  2. Step 2: Convert to fraction form
    393,635/815,275 = 815,275/x
  3. Step 3: Cross multiply
    393,635x = 815,275 × 815,275
  4. Step 4: Simplify right side
    393,635x = 664,673,325,625
  5. Step 5: Solve for x
    x = 664,673,325,625/393,635
  6. Step 6: Final answer
    x = 1,688,552.40

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.