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Finding the Fourth Proportional to 681,783.71, 940,893.56 and 379,979.87

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Solution

The fourth proportional to 681,783.71, 940,893.56 and 379,979.87 is: 524,390.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,783.71 : 940,893.56 = 379,979.87 : x
  2. Step 2: Convert to fraction form
    681,783.71/940,893.56 = 379,979.87/x
  3. Step 3: Cross multiply
    681,783.71x = 940,893.56 × 379,979.87
  4. Step 4: Simplify right side
    681,783.71x = 357,520,610,712.74
  5. Step 5: Solve for x
    x = 357,520,610,712.74/681,783.71
  6. Step 6: Final answer
    x = 524,390.07

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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.