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Finding the Fourth Proportional to 611,998.20, 918,143.10 and 296,195.40

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Solution

The fourth proportional to 611,998.20, 918,143.10 and 296,195.40 is: 444,363.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,998.20 : 918,143.10 = 296,195.40 : x
  2. Step 2: Convert to fraction form
    611,998.20/918,143.10 = 296,195.40/x
  3. Step 3: Cross multiply
    611,998.20x = 918,143.10 × 296,195.40
  4. Step 4: Simplify right side
    611,998.20x = 271,949,762,761.74
  5. Step 5: Solve for x
    x = 271,949,762,761.74/611,998.20
  6. Step 6: Final answer
    x = 444,363.66

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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.