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Finding the Third Proportional to 394.88 and 848.63

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Solution

The third proportional to 394.88 and 848.63 is: 1,823.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.88 : 848.63 = 848.63 : x
  2. Step 2: Convert to fraction form
    394.88/848.63 = 848.63/x
  3. Step 3: Cross multiply
    394.88x = 848.63 × 848.63
  4. Step 4: Simplify right side
    394.88x = 720,164.39
  5. Step 5: Solve for x
    x = 720,164.39/394.88
  6. Step 6: Final answer
    x = 1,823.78

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.