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Finding the Third Proportional to 1,918.69 and 4,122.14

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Solution

The third proportional to 1,918.69 and 4,122.14 is: 8,856.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.69 : 4,122.14 = 4,122.14 : x
  2. Step 2: Convert to fraction form
    1,918.69/4,122.14 = 4,122.14/x
  3. Step 3: Cross multiply
    1,918.69x = 4,122.14 × 4,122.14
  4. Step 4: Simplify right side
    1,918.69x = 16,992,043.33
  5. Step 5: Solve for x
    x = 16,992,043.33/1,918.69
  6. Step 6: Final answer
    x = 8,856.08

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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.