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Finding the Fourth Proportional to 641,960.82, 885,905.73 and 355,480.83

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Solution

The fourth proportional to 641,960.82, 885,905.73 and 355,480.83 is: 490,563.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,960.82 : 885,905.73 = 355,480.83 : x
  2. Step 2: Convert to fraction form
    641,960.82/885,905.73 = 355,480.83/x
  3. Step 3: Cross multiply
    641,960.82x = 885,905.73 × 355,480.83
  4. Step 4: Simplify right side
    641,960.82x = 314,922,504,202.16
  5. Step 5: Solve for x
    x = 314,922,504,202.16/641,960.82
  6. Step 6: Final answer
    x = 490,563.43

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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.