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Finding the Fourth Proportional to 619,800.60, 929,700.90 and 430,843.80

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Solution

The fourth proportional to 619,800.60, 929,700.90 and 430,843.80 is: 646,265.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,800.60 : 929,700.90 = 430,843.80 : x
  2. Step 2: Convert to fraction form
    619,800.60/929,700.90 = 430,843.80/x
  3. Step 3: Cross multiply
    619,800.60x = 929,700.90 × 430,843.80
  4. Step 4: Simplify right side
    619,800.60x = 400,555,868,619.42
  5. Step 5: Solve for x
    x = 400,555,868,619.42/619,800.60
  6. Step 6: Final answer
    x = 646,265.70

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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.