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Finding the Third Proportional to 414,869 and 640,727.50

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Solution

The third proportional to 414,869 and 640,727.50 is: 989,545.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,869 : 640,727.50 = 640,727.50 : x
  2. Step 2: Convert to fraction form
    414,869/640,727.50 = 640,727.50/x
  3. Step 3: Cross multiply
    414,869x = 640,727.50 × 640,727.50
  4. Step 4: Simplify right side
    414,869x = 410,531,729,256.25
  5. Step 5: Solve for x
    x = 410,531,729,256.25/414,869
  6. Step 6: Final answer
    x = 989,545.45

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.