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Finding the Third Proportional to 391,991.75 and 552,028.50

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Solution

The third proportional to 391,991.75 and 552,028.50 is: 777,402.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,991.75 : 552,028.50 = 552,028.50 : x
  2. Step 2: Convert to fraction form
    391,991.75/552,028.50 = 552,028.50/x
  3. Step 3: Cross multiply
    391,991.75x = 552,028.50 × 552,028.50
  4. Step 4: Simplify right side
    391,991.75x = 304,735,464,812.25
  5. Step 5: Solve for x
    x = 304,735,464,812.25/391,991.75
  6. Step 6: Final answer
    x = 777,402.75

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.