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Finding the Fourth Proportional to 407,998.20, 612,083.70 and 123,665.40

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Solution

The fourth proportional to 407,998.20, 612,083.70 and 123,665.40 is: 185,524.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,998.20 : 612,083.70 = 123,665.40 : x
  2. Step 2: Convert to fraction form
    407,998.20/612,083.70 = 123,665.40/x
  3. Step 3: Cross multiply
    407,998.20x = 612,083.70 × 123,665.40
  4. Step 4: Simplify right side
    407,998.20x = 75,693,575,593.98
  5. Step 5: Solve for x
    x = 75,693,575,593.98/407,998.20
  6. Step 6: Final answer
    x = 185,524.29

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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.