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Finding the Fourth Proportional to 619,786.60, 929,679.90 and 519,403.30

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Solution

The fourth proportional to 619,786.60, 929,679.90 and 519,403.30 is: 779,104.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,786.60 : 929,679.90 = 519,403.30 : x
  2. Step 2: Convert to fraction form
    619,786.60/929,679.90 = 519,403.30/x
  3. Step 3: Cross multiply
    619,786.60x = 929,679.90 × 519,403.30
  4. Step 4: Simplify right side
    619,786.60x = 482,878,808,003.67
  5. Step 5: Solve for x
    x = 482,878,808,003.67/619,786.60
  6. Step 6: Final answer
    x = 779,104.95

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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.