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Finding the Fourth Proportional to 323,917.20, 485,657.10 and 166,015.80

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Solution

The fourth proportional to 323,917.20, 485,657.10 and 166,015.80 is: 248,911.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,917.20 : 485,657.10 = 166,015.80 : x
  2. Step 2: Convert to fraction form
    323,917.20/485,657.10 = 166,015.80/x
  3. Step 3: Cross multiply
    323,917.20x = 485,657.10 × 166,015.80
  4. Step 4: Simplify right side
    323,917.20x = 80,626,751,982.18
  5. Step 5: Solve for x
    x = 80,626,751,982.18/323,917.20
  6. Step 6: Final answer
    x = 248,911.61

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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.