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Finding the Fourth Proportional to 539,522.80, 809,284.20 and 290,690.80

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Solution

The fourth proportional to 539,522.80, 809,284.20 and 290,690.80 is: 436,036.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,522.80 : 809,284.20 = 290,690.80 : x
  2. Step 2: Convert to fraction form
    539,522.80/809,284.20 = 290,690.80/x
  3. Step 3: Cross multiply
    539,522.80x = 809,284.20 × 290,690.80
  4. Step 4: Simplify right side
    539,522.80x = 235,251,471,525.36
  5. Step 5: Solve for x
    x = 235,251,471,525.36/539,522.80
  6. Step 6: Final answer
    x = 436,036.20

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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.