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Finding the Third Proportional to 2,979.94 and 6,428.44

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Solution

The third proportional to 2,979.94 and 6,428.44 is: 13,867.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.94 : 6,428.44 = 6,428.44 : x
  2. Step 2: Convert to fraction form
    2,979.94/6,428.44 = 6,428.44/x
  3. Step 3: Cross multiply
    2,979.94x = 6,428.44 × 6,428.44
  4. Step 4: Simplify right side
    2,979.94x = 41,324,808.69
  5. Step 5: Solve for x
    x = 41,324,808.69/2,979.94
  6. Step 6: Final answer
    x = 13,867.68

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.