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Finding the Fourth Proportional to 641,385.86, 885,099.96 and 354,906.14

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Solution

The fourth proportional to 641,385.86, 885,099.96 and 354,906.14 is: 489,763.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,385.86 : 885,099.96 = 354,906.14 : x
  2. Step 2: Convert to fraction form
    641,385.86/885,099.96 = 354,906.14/x
  3. Step 3: Cross multiply
    641,385.86x = 885,099.96 × 354,906.14
  4. Step 4: Simplify right side
    641,385.86x = 314,127,410,317.75
  5. Step 5: Solve for x
    x = 314,127,410,317.75/641,385.86
  6. Step 6: Final answer
    x = 489,763.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.