Home / 685,220.85-945,593.32-379,290.67

Finding the Fourth Proportional to 685,220.85, 945,593.32 and 379,290.67

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Solution

The fourth proportional to 685,220.85, 945,593.32 and 379,290.67 is: 523,414.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,220.85 : 945,593.32 = 379,290.67 : x
  2. Step 2: Convert to fraction form
    685,220.85/945,593.32 = 379,290.67/x
  3. Step 3: Cross multiply
    685,220.85x = 945,593.32 × 379,290.67
  4. Step 4: Simplify right side
    685,220.85x = 358,654,723,890.32
  5. Step 5: Solve for x
    x = 358,654,723,890.32/685,220.85
  6. Step 6: Final answer
    x = 523,414.79

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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.