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Finding the Third Proportional to 979.25 and 1,407.75

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Solution

The third proportional to 979.25 and 1,407.75 is: 2,023.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.25 : 1,407.75 = 1,407.75 : x
  2. Step 2: Convert to fraction form
    979.25/1,407.75 = 1,407.75/x
  3. Step 3: Cross multiply
    979.25x = 1,407.75 × 1,407.75
  4. Step 4: Simplify right side
    979.25x = 1,981,760.06
  5. Step 5: Solve for x
    x = 1,981,760.06/979.25
  6. Step 6: Final answer
    x = 2,023.75

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.