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Finding the Fourth Proportional to 527,998.60, 791,997.90 and 521,000.20

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Solution

The fourth proportional to 527,998.60, 791,997.90 and 521,000.20 is: 781,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,998.60 : 791,997.90 = 521,000.20 : x
  2. Step 2: Convert to fraction form
    527,998.60/791,997.90 = 521,000.20/x
  3. Step 3: Cross multiply
    527,998.60x = 791,997.90 × 521,000.20
  4. Step 4: Simplify right side
    527,998.60x = 412,631,064,299.58
  5. Step 5: Solve for x
    x = 412,631,064,299.58/527,998.60
  6. Step 6: Final answer
    x = 781,500.30

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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.