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Finding the Fourth Proportional to 826,807.80, 1,240,211.70 and 543,372.60

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Solution

The fourth proportional to 826,807.80, 1,240,211.70 and 543,372.60 is: 815,058.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,807.80 : 1,240,211.70 = 543,372.60 : x
  2. Step 2: Convert to fraction form
    826,807.80/1,240,211.70 = 543,372.60/x
  3. Step 3: Cross multiply
    826,807.80x = 1,240,211.70 × 543,372.60
  4. Step 4: Simplify right side
    826,807.80x = 673,897,055,979.42
  5. Step 5: Solve for x
    x = 673,897,055,979.42/826,807.80
  6. Step 6: Final answer
    x = 815,058.90

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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.