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Finding the Fourth Proportional to 393,568.20, 590,352.30 and 127,337.40

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Solution

The fourth proportional to 393,568.20, 590,352.30 and 127,337.40 is: 191,006.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,568.20 : 590,352.30 = 127,337.40 : x
  2. Step 2: Convert to fraction form
    393,568.20/590,352.30 = 127,337.40/x
  3. Step 3: Cross multiply
    393,568.20x = 590,352.30 × 127,337.40
  4. Step 4: Simplify right side
    393,568.20x = 75,173,926,966.02
  5. Step 5: Solve for x
    x = 75,173,926,966.02/393,568.20
  6. Step 6: Final answer
    x = 191,006.10

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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.