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Finding the Fourth Proportional to 519,883.20, 779,824.80 and 145,906.20

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Solution

The fourth proportional to 519,883.20, 779,824.80 and 145,906.20 is: 218,859.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,883.20 : 779,824.80 = 145,906.20 : x
  2. Step 2: Convert to fraction form
    519,883.20/779,824.80 = 145,906.20/x
  3. Step 3: Cross multiply
    519,883.20x = 779,824.80 × 145,906.20
  4. Step 4: Simplify right side
    519,883.20x = 113,781,273,233.76
  5. Step 5: Solve for x
    x = 113,781,273,233.76/519,883.20
  6. Step 6: Final answer
    x = 218,859.30

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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.