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Finding the Fourth Proportional to 619,408.20, 929,185.20 and 219,964.80

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Solution

The fourth proportional to 619,408.20, 929,185.20 and 219,964.80 is: 329,973.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,408.20 : 929,185.20 = 219,964.80 : x
  2. Step 2: Convert to fraction form
    619,408.20/929,185.20 = 219,964.80/x
  3. Step 3: Cross multiply
    619,408.20x = 929,185.20 × 219,964.80
  4. Step 4: Simplify right side
    619,408.20x = 204,388,036,680.96
  5. Step 5: Solve for x
    x = 204,388,036,680.96/619,408.20
  6. Step 6: Final answer
    x = 329,973.09

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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.