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Finding the Third Proportional to 414,958.50 and 640,867.50

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Solution

The third proportional to 414,958.50 and 640,867.50 is: 989,764.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,958.50 : 640,867.50 = 640,867.50 : x
  2. Step 2: Convert to fraction form
    414,958.50/640,867.50 = 640,867.50/x
  3. Step 3: Cross multiply
    414,958.50x = 640,867.50 × 640,867.50
  4. Step 4: Simplify right side
    414,958.50x = 410,711,152,556.25
  5. Step 5: Solve for x
    x = 410,711,152,556.25/414,958.50
  6. Step 6: Final answer
    x = 989,764.40

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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.