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Finding the Fourth Proportional to 681,785.71, 940,896.32 and 379,981.87

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Solution

The fourth proportional to 681,785.71, 940,896.32 and 379,981.87 is: 524,392.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,785.71 : 940,896.32 = 379,981.87 : x
  2. Step 2: Convert to fraction form
    681,785.71/940,896.32 = 379,981.87/x
  3. Step 3: Cross multiply
    681,785.71x = 940,896.32 × 379,981.87
  4. Step 4: Simplify right side
    681,785.71x = 357,523,541,249.81
  5. Step 5: Solve for x
    x = 357,523,541,249.81/681,785.71
  6. Step 6: Final answer
    x = 524,392.83

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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.