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Finding the Fourth Proportional to 623,906.60, 935,859.90 and 518,930.60

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Solution

The fourth proportional to 623,906.60, 935,859.90 and 518,930.60 is: 778,395.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,906.60 : 935,859.90 = 518,930.60 : x
  2. Step 2: Convert to fraction form
    623,906.60/935,859.90 = 518,930.60/x
  3. Step 3: Cross multiply
    623,906.60x = 935,859.90 × 518,930.60
  4. Step 4: Simplify right side
    623,906.60x = 485,646,339,422.94
  5. Step 5: Solve for x
    x = 485,646,339,422.94/623,906.60
  6. Step 6: Final answer
    x = 778,395.90

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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.