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Finding the Fourth Proportional to 665,763.68, 998,897.60 and 399,709.92

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Solution

The fourth proportional to 665,763.68, 998,897.60 and 399,709.92 is: 599,716.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,763.68 : 998,897.60 = 399,709.92 : x
  2. Step 2: Convert to fraction form
    665,763.68/998,897.60 = 399,709.92/x
  3. Step 3: Cross multiply
    665,763.68x = 998,897.60 × 399,709.92
  4. Step 4: Simplify right side
    665,763.68x = 399,269,279,784.19
  5. Step 5: Solve for x
    x = 399,269,279,784.19/665,763.68
  6. Step 6: Final answer
    x = 599,716.22

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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.