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Finding the Fourth Proportional to 393,243.45, 589,767.39 and 168,578.43

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Solution

The fourth proportional to 393,243.45, 589,767.39 and 168,578.43 is: 252,825.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,243.45 : 589,767.39 = 168,578.43 : x
  2. Step 2: Convert to fraction form
    393,243.45/589,767.39 = 168,578.43/x
  3. Step 3: Cross multiply
    393,243.45x = 589,767.39 × 168,578.43
  4. Step 4: Simplify right side
    393,243.45x = 99,422,060,671.40
  5. Step 5: Solve for x
    x = 99,422,060,671.40/393,243.45
  6. Step 6: Final answer
    x = 252,825.73

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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.