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Finding the Fourth Proportional to 619,782.60, 929,673.90 and 519,399.30

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Solution

The fourth proportional to 619,782.60, 929,673.90 and 519,399.30 is: 779,098.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,782.60 : 929,673.90 = 519,399.30 : x
  2. Step 2: Convert to fraction form
    619,782.60/929,673.90 = 519,399.30/x
  3. Step 3: Cross multiply
    619,782.60x = 929,673.90 × 519,399.30
  4. Step 4: Simplify right side
    619,782.60x = 482,871,972,888.27
  5. Step 5: Solve for x
    x = 482,871,972,888.27/619,782.60
  6. Step 6: Final answer
    x = 779,098.95

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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.