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Finding the Fourth Proportional to 827,240.80, 1,240,861.20 and 543,805.60

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Solution

The fourth proportional to 827,240.80, 1,240,861.20 and 543,805.60 is: 815,708.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,240.80 : 1,240,861.20 = 543,805.60 : x
  2. Step 2: Convert to fraction form
    827,240.80/1,240,861.20 = 543,805.60/x
  3. Step 3: Cross multiply
    827,240.80x = 1,240,861.20 × 543,805.60
  4. Step 4: Simplify right side
    827,240.80x = 674,787,269,382.72
  5. Step 5: Solve for x
    x = 674,787,269,382.72/827,240.80
  6. Step 6: Final answer
    x = 815,708.40

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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.