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Finding the Fourth Proportional to 519,906.60, 779,859.90 and 145,929.60

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Solution

The fourth proportional to 519,906.60, 779,859.90 and 145,929.60 is: 218,894.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,906.60 : 779,859.90 = 145,929.60 : x
  2. Step 2: Convert to fraction form
    519,906.60/779,859.90 = 145,929.60/x
  3. Step 3: Cross multiply
    519,906.60x = 779,859.90 × 145,929.60
  4. Step 4: Simplify right side
    519,906.60x = 113,804,643,263.04
  5. Step 5: Solve for x
    x = 113,804,643,263.04/519,906.60
  6. Step 6: Final answer
    x = 218,894.40

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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.