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Finding the Fourth Proportional to 619,127.40, 927,135.90 and 407,620.20

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Solution

The fourth proportional to 619,127.40, 927,135.90 and 407,620.20 is: 610,406.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,127.40 : 927,135.90 = 407,620.20 : x
  2. Step 2: Convert to fraction form
    619,127.40/927,135.90 = 407,620.20/x
  3. Step 3: Cross multiply
    619,127.40x = 927,135.90 × 407,620.20
  4. Step 4: Simplify right side
    619,127.40x = 377,919,320,985.18
  5. Step 5: Solve for x
    x = 377,919,320,985.18/619,127.40
  6. Step 6: Final answer
    x = 610,406.39

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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.