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Finding the Fourth Proportional to 519,172.14, 778,754.70 and 279,398.88

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Solution

The fourth proportional to 519,172.14, 778,754.70 and 279,398.88 is: 419,096.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,172.14 : 778,754.70 = 279,398.88 : x
  2. Step 2: Convert to fraction form
    519,172.14/778,754.70 = 279,398.88/x
  3. Step 3: Cross multiply
    519,172.14x = 778,754.70 × 279,398.88
  4. Step 4: Simplify right side
    519,172.14x = 217,583,190,974.74
  5. Step 5: Solve for x
    x = 217,583,190,974.74/519,172.14
  6. Step 6: Final answer
    x = 419,096.43

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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.