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Finding the Third Proportional to 653.25 and 979.75

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Solution

The third proportional to 653.25 and 979.75 is: 1,469.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.25 : 979.75 = 979.75 : x
  2. Step 2: Convert to fraction form
    653.25/979.75 = 979.75/x
  3. Step 3: Cross multiply
    653.25x = 979.75 × 979.75
  4. Step 4: Simplify right side
    653.25x = 959,910.06
  5. Step 5: Solve for x
    x = 959,910.06/653.25
  6. Step 6: Final answer
    x = 1,469.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.