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Finding the Third Proportional to 393,590 and 815,188

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Solution

The third proportional to 393,590 and 815,188 is: 1,688,385.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,590 : 815,188 = 815,188 : x
  2. Step 2: Convert to fraction form
    393,590/815,188 = 815,188/x
  3. Step 3: Cross multiply
    393,590x = 815,188 × 815,188
  4. Step 4: Simplify right side
    393,590x = 664,531,475,344
  5. Step 5: Solve for x
    x = 664,531,475,344/393,590
  6. Step 6: Final answer
    x = 1,688,385.06

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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.