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Finding the Third Proportional to 1,778.84 and 3,865.22

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Solution

The third proportional to 1,778.84 and 3,865.22 is: 8,398.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.84 : 3,865.22 = 3,865.22 : x
  2. Step 2: Convert to fraction form
    1,778.84/3,865.22 = 3,865.22/x
  3. Step 3: Cross multiply
    1,778.84x = 3,865.22 × 3,865.22
  4. Step 4: Simplify right side
    1,778.84x = 14,939,915.99
  5. Step 5: Solve for x
    x = 14,939,915.99/1,778.84
  6. Step 6: Final answer
    x = 8,398.70

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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.