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Finding the Third Proportional to 415,212.75 and 677,998.50

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Solution

The third proportional to 415,212.75 and 677,998.50 is: 1,107,099.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,212.75 : 677,998.50 = 677,998.50 : x
  2. Step 2: Convert to fraction form
    415,212.75/677,998.50 = 677,998.50/x
  3. Step 3: Cross multiply
    415,212.75x = 677,998.50 × 677,998.50
  4. Step 4: Simplify right side
    415,212.75x = 459,681,966,002.25
  5. Step 5: Solve for x
    x = 459,681,966,002.25/415,212.75
  6. Step 6: Final answer
    x = 1,107,099.83

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.