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Finding the Fourth Proportional to 619,414.20, 929,121.30 and 479,446.20

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Solution

The fourth proportional to 619,414.20, 929,121.30 and 479,446.20 is: 719,169.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,414.20 : 929,121.30 = 479,446.20 : x
  2. Step 2: Convert to fraction form
    619,414.20/929,121.30 = 479,446.20/x
  3. Step 3: Cross multiply
    619,414.20x = 929,121.30 × 479,446.20
  4. Step 4: Simplify right side
    619,414.20x = 445,463,676,624.06
  5. Step 5: Solve for x
    x = 445,463,676,624.06/619,414.20
  6. Step 6: Final answer
    x = 719,169.30

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Half scale
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Double scale
Find fourth proportional to 619,415.20, 929,122.80 and 479,447.20
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.