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Finding the Fourth Proportional to 393,372.40, 589,621.20 and 168,694.60

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Solution

The fourth proportional to 393,372.40, 589,621.20 and 168,694.60 is: 252,854.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,372.40 : 589,621.20 = 168,694.60 : x
  2. Step 2: Convert to fraction form
    393,372.40/589,621.20 = 168,694.60/x
  3. Step 3: Cross multiply
    393,372.40x = 589,621.20 × 168,694.60
  4. Step 4: Simplify right side
    393,372.40x = 99,465,912,485.52
  5. Step 5: Solve for x
    x = 99,465,912,485.52/393,372.40
  6. Step 6: Final answer
    x = 252,854.32

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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.