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Finding the Fourth Proportional to 619,365.20, 929,047.80 and 554,411.30

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Solution

The fourth proportional to 619,365.20, 929,047.80 and 554,411.30 is: 831,616.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,365.20 : 929,047.80 = 554,411.30 : x
  2. Step 2: Convert to fraction form
    619,365.20/929,047.80 = 554,411.30/x
  3. Step 3: Cross multiply
    619,365.20x = 929,047.80 × 554,411.30
  4. Step 4: Simplify right side
    619,365.20x = 515,074,598,560.14
  5. Step 5: Solve for x
    x = 515,074,598,560.14/619,365.20
  6. Step 6: Final answer
    x = 831,616.95

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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.