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Finding the Fourth Proportional to 393,660.28, 590,584.13 and 127,420.78

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Solution

The fourth proportional to 393,660.28, 590,584.13 and 127,420.78 is: 191,161.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,660.28 : 590,584.13 = 127,420.78 : x
  2. Step 2: Convert to fraction form
    393,660.28/590,584.13 = 127,420.78/x
  3. Step 3: Cross multiply
    393,660.28x = 590,584.13 × 127,420.78
  4. Step 4: Simplify right side
    393,660.28x = 75,252,687,547.30
  5. Step 5: Solve for x
    x = 75,252,687,547.30/393,660.28
  6. Step 6: Final answer
    x = 191,161.49

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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.