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Finding the Fourth Proportional to 539,366.20, 809,714.90 and 339,686.20

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Solution

The fourth proportional to 539,366.20, 809,714.90 and 339,686.20 is: 509,948.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,366.20 : 809,714.90 = 339,686.20 : x
  2. Step 2: Convert to fraction form
    539,366.20/809,714.90 = 339,686.20/x
  3. Step 3: Cross multiply
    539,366.20x = 809,714.90 × 339,686.20
  4. Step 4: Simplify right side
    539,366.20x = 275,048,977,464.38
  5. Step 5: Solve for x
    x = 275,048,977,464.38/539,366.20
  6. Step 6: Final answer
    x = 509,948.49

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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.