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Finding the Third Proportional to 394.59 and 857.44

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Solution

The third proportional to 394.59 and 857.44 is: 1,863.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.59 : 857.44 = 857.44 : x
  2. Step 2: Convert to fraction form
    394.59/857.44 = 857.44/x
  3. Step 3: Cross multiply
    394.59x = 857.44 × 857.44
  4. Step 4: Simplify right side
    394.59x = 735,199.07
  5. Step 5: Solve for x
    x = 735,199.07/394.59
  6. Step 6: Final answer
    x = 1,863.18

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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.