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Finding the Fourth Proportional to 439,236.90, 658,855.35 and 261,944.10

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Solution

The fourth proportional to 439,236.90, 658,855.35 and 261,944.10 is: 392,916.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,236.90 : 658,855.35 = 261,944.10 : x
  2. Step 2: Convert to fraction form
    439,236.90/658,855.35 = 261,944.10/x
  3. Step 3: Cross multiply
    439,236.90x = 658,855.35 × 261,944.10
  4. Step 4: Simplify right side
    439,236.90x = 172,583,271,685.94
  5. Step 5: Solve for x
    x = 172,583,271,685.94/439,236.90
  6. Step 6: Final answer
    x = 392,916.15

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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.