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Finding the Third Proportional to 175,400 and 385,790

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Solution

The third proportional to 175,400 and 385,790 is: 848,540.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    175,400 : 385,790 = 385,790 : x
  2. Step 2: Convert to fraction form
    175,400/385,790 = 385,790/x
  3. Step 3: Cross multiply
    175,400x = 385,790 × 385,790
  4. Step 4: Simplify right side
    175,400x = 148,833,924,100
  5. Step 5: Solve for x
    x = 148,833,924,100/175,400
  6. Step 6: Final answer
    x = 848,540.05

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.