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Finding the Fourth Proportional to 393,729.90, 590,680.97 and 127,517.33

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Solution

The fourth proportional to 393,729.90, 590,680.97 and 127,517.33 is: 191,303.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,729.90 : 590,680.97 = 127,517.33 : x
  2. Step 2: Convert to fraction form
    393,729.90/590,680.97 = 127,517.33/x
  3. Step 3: Cross multiply
    393,729.90x = 590,680.97 × 127,517.33
  4. Step 4: Simplify right side
    393,729.90x = 75,322,057,541.60
  5. Step 5: Solve for x
    x = 75,322,057,541.60/393,729.90
  6. Step 6: Final answer
    x = 191,303.88

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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.