Home / 641,961.57-885,906.90-355,481.70

Finding the Fourth Proportional to 641,961.57, 885,906.90 and 355,481.70

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Solution

The fourth proportional to 641,961.57, 885,906.90 and 355,481.70 is: 490,564.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,961.57 : 885,906.90 = 355,481.70 : x
  2. Step 2: Convert to fraction form
    641,961.57/885,906.90 = 355,481.70/x
  3. Step 3: Cross multiply
    641,961.57x = 885,906.90 × 355,481.70
  4. Step 4: Simplify right side
    641,961.57x = 314,923,690,853.73
  5. Step 5: Solve for x
    x = 314,923,690,853.73/641,961.57
  6. Step 6: Final answer
    x = 490,564.71

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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.