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Finding the Third Proportional to 175,396 and 378,820

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Solution

The third proportional to 175,396 and 378,820 is: 818,174.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    175,396 : 378,820 = 378,820 : x
  2. Step 2: Convert to fraction form
    175,396/378,820 = 378,820/x
  3. Step 3: Cross multiply
    175,396x = 378,820 × 378,820
  4. Step 4: Simplify right side
    175,396x = 143,504,592,400
  5. Step 5: Solve for x
    x = 143,504,592,400/175,396
  6. Step 6: Final answer
    x = 818,174.83

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.