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Finding the Fourth Proportional to 419,189.37, 631,608.45 and 345,949.98

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Solution

The fourth proportional to 419,189.37, 631,608.45 and 345,949.98 is: 521,255.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,189.37 : 631,608.45 = 345,949.98 : x
  2. Step 2: Convert to fraction form
    419,189.37/631,608.45 = 345,949.98/x
  3. Step 3: Cross multiply
    419,189.37x = 631,608.45 × 345,949.98
  4. Step 4: Simplify right side
    419,189.37x = 218,504,930,645.33
  5. Step 5: Solve for x
    x = 218,504,930,645.33/419,189.37
  6. Step 6: Final answer
    x = 521,255.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.