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Finding the Fourth Proportional to 611,579.40, 917,369.10 and 523,005.90

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Solution

The fourth proportional to 611,579.40, 917,369.10 and 523,005.90 is: 784,508.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,579.40 : 917,369.10 = 523,005.90 : x
  2. Step 2: Convert to fraction form
    611,579.40/917,369.10 = 523,005.90/x
  3. Step 3: Cross multiply
    611,579.40x = 917,369.10 × 523,005.90
  4. Step 4: Simplify right side
    611,579.40x = 479,789,451,777.69
  5. Step 5: Solve for x
    x = 479,789,451,777.69/611,579.40
  6. Step 6: Final answer
    x = 784,508.85

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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.