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Finding the Fourth Proportional to 685,399.26, 945,850.86 and 383,593.26

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Solution

The fourth proportional to 685,399.26, 945,850.86 and 383,593.26 is: 529,358.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,399.26 : 945,850.86 = 383,593.26 : x
  2. Step 2: Convert to fraction form
    685,399.26/945,850.86 = 383,593.26/x
  3. Step 3: Cross multiply
    685,399.26x = 945,850.86 × 383,593.26
  4. Step 4: Simplify right side
    685,399.26x = 362,822,014,861.20
  5. Step 5: Solve for x
    x = 362,822,014,861.20/685,399.26
  6. Step 6: Final answer
    x = 529,358.63

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.