Home / 1,321,105.20-1,981,657.80-323,833.20

Finding the Fourth Proportional to 1,321,105.20, 1,981,657.80 and 323,833.20

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Solution

The fourth proportional to 1,321,105.20, 1,981,657.80 and 323,833.20 is: 485,749.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,105.20 : 1,981,657.80 = 323,833.20 : x
  2. Step 2: Convert to fraction form
    1,321,105.20/1,981,657.80 = 323,833.20/x
  3. Step 3: Cross multiply
    1,321,105.20x = 1,981,657.80 × 323,833.20
  4. Step 4: Simplify right side
    1,321,105.20x = 641,726,586,678.96
  5. Step 5: Solve for x
    x = 641,726,586,678.96/1,321,105.20
  6. Step 6: Final answer
    x = 485,749.80

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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.