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Finding the Fourth Proportional to 519,940.10, 779,910.15 and 145,963.10

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Solution

The fourth proportional to 519,940.10, 779,910.15 and 145,963.10 is: 218,944.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,940.10 : 779,910.15 = 145,963.10 : x
  2. Step 2: Convert to fraction form
    519,940.10/779,910.15 = 145,963.10/x
  3. Step 3: Cross multiply
    519,940.10x = 779,910.15 × 145,963.10
  4. Step 4: Simplify right side
    519,940.10x = 113,838,103,215.47
  5. Step 5: Solve for x
    x = 113,838,103,215.47/519,940.10
  6. Step 6: Final answer
    x = 218,944.65

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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.