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Finding the Fourth Proportional to 685,494.80, 946,097.97 and 399,183.70

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Solution

The fourth proportional to 685,494.80, 946,097.97 and 399,183.70 is: 550,940.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,494.80 : 946,097.97 = 399,183.70 : x
  2. Step 2: Convert to fraction form
    685,494.80/946,097.97 = 399,183.70/x
  3. Step 3: Cross multiply
    685,494.80x = 946,097.97 × 399,183.70
  4. Step 4: Simplify right side
    685,494.80x = 377,666,888,227.09
  5. Step 5: Solve for x
    x = 377,666,888,227.09/685,494.80
  6. Step 6: Final answer
    x = 550,940.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.