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Finding the Fourth Proportional to 393,911.10, 590,939.55 and 127,680.30

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Solution

The fourth proportional to 393,911.10, 590,939.55 and 127,680.30 is: 191,544.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,911.10 : 590,939.55 = 127,680.30 : x
  2. Step 2: Convert to fraction form
    393,911.10/590,939.55 = 127,680.30/x
  3. Step 3: Cross multiply
    393,911.10x = 590,939.55 × 127,680.30
  4. Step 4: Simplify right side
    393,911.10x = 75,451,339,025.87
  5. Step 5: Solve for x
    x = 75,451,339,025.87/393,911.10
  6. Step 6: Final answer
    x = 191,544.08

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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.