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Finding the Fourth Proportional to 619,985.20, 930,107.40 and 199,303.60

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Solution

The fourth proportional to 619,985.20, 930,107.40 and 199,303.60 is: 298,997.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,985.20 : 930,107.40 = 199,303.60 : x
  2. Step 2: Convert to fraction form
    619,985.20/930,107.40 = 199,303.60/x
  3. Step 3: Cross multiply
    619,985.20x = 930,107.40 × 199,303.60
  4. Step 4: Simplify right side
    619,985.20x = 185,373,753,206.64
  5. Step 5: Solve for x
    x = 185,373,753,206.64/619,985.20
  6. Step 6: Final answer
    x = 298,997.06

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Double scale
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Similar ratio
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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.