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Finding the Fourth Proportional to 643,403.80, 965,105.70 and 483,736.60

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Solution

The fourth proportional to 643,403.80, 965,105.70 and 483,736.60 is: 725,604.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,403.80 : 965,105.70 = 483,736.60 : x
  2. Step 2: Convert to fraction form
    643,403.80/965,105.70 = 483,736.60/x
  3. Step 3: Cross multiply
    643,403.80x = 965,105.70 × 483,736.60
  4. Step 4: Simplify right side
    643,403.80x = 466,856,949,958.62
  5. Step 5: Solve for x
    x = 466,856,949,958.62/643,403.80
  6. Step 6: Final answer
    x = 725,604.90

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.