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Finding the Fourth Proportional to 521,960.13, 782,940.20 and 127,976.13

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Solution

The fourth proportional to 521,960.13, 782,940.20 and 127,976.13 is: 191,964.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,960.13 : 782,940.20 = 127,976.13 : x
  2. Step 2: Convert to fraction form
    521,960.13/782,940.20 = 127,976.13/x
  3. Step 3: Cross multiply
    521,960.13x = 782,940.20 × 127,976.13
  4. Step 4: Simplify right side
    521,960.13x = 100,197,656,817.43
  5. Step 5: Solve for x
    x = 100,197,656,817.43/521,960.13
  6. Step 6: Final answer
    x = 191,964.20

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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.