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Finding the Fourth Proportional to 619,815.80, 929,982.90 and 199,220.60

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Solution

The fourth proportional to 619,815.80, 929,982.90 and 199,220.60 is: 298,914.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,815.80 : 929,982.90 = 199,220.60 : x
  2. Step 2: Convert to fraction form
    619,815.80/929,982.90 = 199,220.60/x
  3. Step 3: Cross multiply
    619,815.80x = 929,982.90 × 199,220.60
  4. Step 4: Simplify right side
    619,815.80x = 185,271,751,327.74
  5. Step 5: Solve for x
    x = 185,271,751,327.74/619,815.80
  6. Step 6: Final answer
    x = 298,914.21

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1.5x scale

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.