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Finding the Fourth Proportional to 681,896.76, 940,671.66 and 520,471.56

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Solution

The fourth proportional to 681,896.76, 940,671.66 and 520,471.56 is: 717,986.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,896.76 : 940,671.66 = 520,471.56 : x
  2. Step 2: Convert to fraction form
    681,896.76/940,671.66 = 520,471.56/x
  3. Step 3: Cross multiply
    681,896.76x = 940,671.66 × 520,471.56
  4. Step 4: Simplify right side
    681,896.76x = 489,592,846,327.99
  5. Step 5: Solve for x
    x = 489,592,846,327.99/681,896.76
  6. Step 6: Final answer
    x = 717,986.76

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Double scale
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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.