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Finding the Fourth Proportional to 681,194.76, 940,048.78 and 379,388.76

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Solution

The fourth proportional to 681,194.76, 940,048.78 and 379,388.76 is: 523,556.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,194.76 : 940,048.78 = 379,388.76 : x
  2. Step 2: Convert to fraction form
    681,194.76/940,048.78 = 379,388.76/x
  3. Step 3: Cross multiply
    681,194.76x = 940,048.78 × 379,388.76
  4. Step 4: Simplify right side
    681,194.76x = 356,643,940,983.71
  5. Step 5: Solve for x
    x = 356,643,940,983.71/681,194.76
  6. Step 6: Final answer
    x = 523,556.50

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.