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Finding the Third Proportional to 398,958.75 and 865,736.44

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Solution

The third proportional to 398,958.75 and 865,736.44 is: 1,878,639.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,958.75 : 865,736.44 = 865,736.44 : x
  2. Step 2: Convert to fraction form
    398,958.75/865,736.44 = 865,736.44/x
  3. Step 3: Cross multiply
    398,958.75x = 865,736.44 × 865,736.44
  4. Step 4: Simplify right side
    398,958.75x = 749,499,579,215.19
  5. Step 5: Solve for x
    x = 749,499,579,215.19/398,958.75
  6. Step 6: Final answer
    x = 1,878,639.28

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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.