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Finding the Fourth Proportional to 405,581.85, 608,372.78 and 353,093.85

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Solution

The fourth proportional to 405,581.85, 608,372.78 and 353,093.85 is: 529,640.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,581.85 : 608,372.78 = 353,093.85 : x
  2. Step 2: Convert to fraction form
    405,581.85/608,372.78 = 353,093.85/x
  3. Step 3: Cross multiply
    405,581.85x = 608,372.78 × 353,093.85
  4. Step 4: Simplify right side
    405,581.85x = 214,812,685,359.93
  5. Step 5: Solve for x
    x = 214,812,685,359.93/405,581.85
  6. Step 6: Final answer
    x = 529,640.78

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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.