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Finding the Fourth Proportional to 325,861.40, 488,792.10 and 220,107.80

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Solution

The fourth proportional to 325,861.40, 488,792.10 and 220,107.80 is: 330,161.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,861.40 : 488,792.10 = 220,107.80 : x
  2. Step 2: Convert to fraction form
    325,861.40/488,792.10 = 220,107.80/x
  3. Step 3: Cross multiply
    325,861.40x = 488,792.10 × 220,107.80
  4. Step 4: Simplify right side
    325,861.40x = 107,586,953,788.38
  5. Step 5: Solve for x
    x = 107,586,953,788.38/325,861.40
  6. Step 6: Final answer
    x = 330,161.70

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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.