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Finding the Fourth Proportional to 619,804.40, 929,706.60 and 419,037.80

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Solution

The fourth proportional to 619,804.40, 929,706.60 and 419,037.80 is: 628,556.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,804.40 : 929,706.60 = 419,037.80 : x
  2. Step 2: Convert to fraction form
    619,804.40/929,706.60 = 419,037.80/x
  3. Step 3: Cross multiply
    619,804.40x = 929,706.60 × 419,037.80
  4. Step 4: Simplify right side
    619,804.40x = 389,582,208,309.48
  5. Step 5: Solve for x
    x = 389,582,208,309.48/619,804.40
  6. Step 6: Final answer
    x = 628,556.70

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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.