Home / 681,103.71-939,923.05-394,789.87

Finding the Fourth Proportional to 681,103.71, 939,923.05 and 394,789.87

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Solution

The fourth proportional to 681,103.71, 939,923.05 and 394,789.87 is: 544,809.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,103.71 : 939,923.05 = 394,789.87 : x
  2. Step 2: Convert to fraction form
    681,103.71/939,923.05 = 394,789.87/x
  3. Step 3: Cross multiply
    681,103.71x = 939,923.05 × 394,789.87
  4. Step 4: Simplify right side
    681,103.71x = 371,072,098,719.50
  5. Step 5: Solve for x
    x = 371,072,098,719.50/681,103.71
  6. Step 6: Final answer
    x = 544,809.98

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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.