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Finding the Fourth Proportional to 519,770.78, 779,656.20 and 125,786.78

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Solution

The fourth proportional to 519,770.78, 779,656.20 and 125,786.78 is: 188,680.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,770.78 : 779,656.20 = 125,786.78 : x
  2. Step 2: Convert to fraction form
    519,770.78/779,656.20 = 125,786.78/x
  3. Step 3: Cross multiply
    519,770.78x = 779,656.20 × 125,786.78
  4. Step 4: Simplify right side
    519,770.78x = 98,070,442,905.04
  5. Step 5: Solve for x
    x = 98,070,442,905.04/519,770.78
  6. Step 6: Final answer
    x = 188,680.18

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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.