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Finding the Third Proportional to 275,208.75 and 421,017.75

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Solution

The third proportional to 275,208.75 and 421,017.75 is: 644,078.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,208.75 : 421,017.75 = 421,017.75 : x
  2. Step 2: Convert to fraction form
    275,208.75/421,017.75 = 421,017.75/x
  3. Step 3: Cross multiply
    275,208.75x = 421,017.75 × 421,017.75
  4. Step 4: Simplify right side
    275,208.75x = 177,255,945,815.06
  5. Step 5: Solve for x
    x = 177,255,945,815.06/275,208.75
  6. Step 6: Final answer
    x = 644,078.16

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.