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Finding the Fourth Proportional to 619,903.80, 929,855.70 and 220,557.60

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Solution

The fourth proportional to 619,903.80, 929,855.70 and 220,557.60 is: 330,836.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,903.80 : 929,855.70 = 220,557.60 : x
  2. Step 2: Convert to fraction form
    619,903.80/929,855.70 = 220,557.60/x
  3. Step 3: Cross multiply
    619,903.80x = 929,855.70 × 220,557.60
  4. Step 4: Simplify right side
    619,903.80x = 205,086,741,538.32
  5. Step 5: Solve for x
    x = 205,086,741,538.32/619,903.80
  6. Step 6: Final answer
    x = 330,836.40

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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.