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Finding the Third Proportional to 312,923.25 and 640,722.66

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Solution

The third proportional to 312,923.25 and 640,722.66 is: 1,311,904.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,923.25 : 640,722.66 = 640,722.66 : x
  2. Step 2: Convert to fraction form
    312,923.25/640,722.66 = 640,722.66/x
  3. Step 3: Cross multiply
    312,923.25x = 640,722.66 × 640,722.66
  4. Step 4: Simplify right side
    312,923.25x = 410,525,522,232.06
  5. Step 5: Solve for x
    x = 410,525,522,232.06/312,923.25
  6. Step 6: Final answer
    x = 1,311,904.83

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.