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Finding the Third Proportional to 321,939.50 and 699,283.50

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Solution

The third proportional to 321,939.50 and 699,283.50 is: 1,518,910.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,939.50 : 699,283.50 = 699,283.50 : x
  2. Step 2: Convert to fraction form
    321,939.50/699,283.50 = 699,283.50/x
  3. Step 3: Cross multiply
    321,939.50x = 699,283.50 × 699,283.50
  4. Step 4: Simplify right side
    321,939.50x = 488,997,413,372.25
  5. Step 5: Solve for x
    x = 488,997,413,372.25/321,939.50
  6. Step 6: Final answer
    x = 1,518,910.89

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.