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Finding the Fourth Proportional to 419,935.60, 629,903.40 and 397,190.80

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Solution

The fourth proportional to 419,935.60, 629,903.40 and 397,190.80 is: 595,786.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,935.60 : 629,903.40 = 397,190.80 : x
  2. Step 2: Convert to fraction form
    419,935.60/629,903.40 = 397,190.80/x
  3. Step 3: Cross multiply
    419,935.60x = 629,903.40 × 397,190.80
  4. Step 4: Simplify right side
    419,935.60x = 250,191,835,368.72
  5. Step 5: Solve for x
    x = 250,191,835,368.72/419,935.60
  6. Step 6: Final answer
    x = 595,786.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.