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Finding the Third Proportional to 1,785 and 3,894

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Solution

The third proportional to 1,785 and 3,894 is: 8,494.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785 : 3,894 = 3,894 : x
  2. Step 2: Convert to fraction form
    1,785/3,894 = 3,894/x
  3. Step 3: Cross multiply
    1,785x = 3,894 × 3,894
  4. Step 4: Simplify right side
    1,785x = 15,163,236
  5. Step 5: Solve for x
    x = 15,163,236/1,785
  6. Step 6: Final answer
    x = 8,494.81

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.