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Finding the Fourth Proportional to 619,884.90, 928,843.20 and 409,276.80

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Solution

The fourth proportional to 619,884.90, 928,843.20 and 409,276.80 is: 613,265.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,884.90 : 928,843.20 = 409,276.80 : x
  2. Step 2: Convert to fraction form
    619,884.90/928,843.20 = 409,276.80/x
  3. Step 3: Cross multiply
    619,884.90x = 928,843.20 × 409,276.80
  4. Step 4: Simplify right side
    619,884.90x = 380,153,972,597.76
  5. Step 5: Solve for x
    x = 380,153,972,597.76/619,884.90
  6. Step 6: Final answer
    x = 613,265.42

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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.