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Finding the Fourth Proportional to 619,878.60, 929,817.90 and 514,902.60

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Solution

The fourth proportional to 619,878.60, 929,817.90 and 514,902.60 is: 772,353.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,878.60 : 929,817.90 = 514,902.60 : x
  2. Step 2: Convert to fraction form
    619,878.60/929,817.90 = 514,902.60/x
  3. Step 3: Cross multiply
    619,878.60x = 929,817.90 × 514,902.60
  4. Step 4: Simplify right side
    619,878.60x = 478,765,654,236.54
  5. Step 5: Solve for x
    x = 478,765,654,236.54/619,878.60
  6. Step 6: Final answer
    x = 772,353.90

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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.