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Finding the Fourth Proportional to 393,949.20, 590,923.80 and 127,718.40

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Solution

The fourth proportional to 393,949.20, 590,923.80 and 127,718.40 is: 191,577.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,949.20 : 590,923.80 = 127,718.40 : x
  2. Step 2: Convert to fraction form
    393,949.20/590,923.80 = 127,718.40/x
  3. Step 3: Cross multiply
    393,949.20x = 590,923.80 × 127,718.40
  4. Step 4: Simplify right side
    393,949.20x = 75,471,842,257.92
  5. Step 5: Solve for x
    x = 75,471,842,257.92/393,949.20
  6. Step 6: Final answer
    x = 191,577.60

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1.5x scale

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.