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Finding the Fourth Proportional to 539,399.80, 809,099.70 and 339,945.40

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Solution

The fourth proportional to 539,399.80, 809,099.70 and 339,945.40 is: 509,918.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,399.80 : 809,099.70 = 339,945.40 : x
  2. Step 2: Convert to fraction form
    539,399.80/809,099.70 = 339,945.40/x
  3. Step 3: Cross multiply
    539,399.80x = 809,099.70 × 339,945.40
  4. Step 4: Simplify right side
    539,399.80x = 275,049,721,156.38
  5. Step 5: Solve for x
    x = 275,049,721,156.38/539,399.80
  6. Step 6: Final answer
    x = 509,918.10

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Half scale
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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.