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Finding the Third Proportional to 669.38 and 1,383.19

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Solution

The third proportional to 669.38 and 1,383.19 is: 2,858.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.38 : 1,383.19 = 1,383.19 : x
  2. Step 2: Convert to fraction form
    669.38/1,383.19 = 1,383.19/x
  3. Step 3: Cross multiply
    669.38x = 1,383.19 × 1,383.19
  4. Step 4: Simplify right side
    669.38x = 1,913,207.66
  5. Step 5: Solve for x
    x = 1,913,207.66/669.38
  6. Step 6: Final answer
    x = 2,858.20

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.