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Finding the Third Proportional to 646,679.25 and 978,963.75

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Solution

The third proportional to 646,679.25 and 978,963.75 is: 1,481,986.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,679.25 : 978,963.75 = 978,963.75 : x
  2. Step 2: Convert to fraction form
    646,679.25/978,963.75 = 978,963.75/x
  3. Step 3: Cross multiply
    646,679.25x = 978,963.75 × 978,963.75
  4. Step 4: Simplify right side
    646,679.25x = 958,370,023,814.06
  5. Step 5: Solve for x
    x = 958,370,023,814.06/646,679.25
  6. Step 6: Final answer
    x = 1,481,986.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.