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Finding the Fourth Proportional to 557,815.80, 836,723.70 and 519,324.60

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Solution

The fourth proportional to 557,815.80, 836,723.70 and 519,324.60 is: 778,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,815.80 : 836,723.70 = 519,324.60 : x
  2. Step 2: Convert to fraction form
    557,815.80/836,723.70 = 519,324.60/x
  3. Step 3: Cross multiply
    557,815.80x = 836,723.70 × 519,324.60
  4. Step 4: Simplify right side
    557,815.80x = 434,531,200,813.02
  5. Step 5: Solve for x
    x = 434,531,200,813.02/557,815.80
  6. Step 6: Final answer
    x = 778,986.90

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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.