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Finding the Fourth Proportional to 312,481.43, 431,226.66 and 169,242.65

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Solution

The fourth proportional to 312,481.43, 431,226.66 and 169,242.65 is: 233,556.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,481.43 : 431,226.66 = 169,242.65 : x
  2. Step 2: Convert to fraction form
    312,481.43/431,226.66 = 169,242.65/x
  3. Step 3: Cross multiply
    312,481.43x = 431,226.66 × 169,242.65
  4. Step 4: Simplify right side
    312,481.43x = 72,981,940,532.92
  5. Step 5: Solve for x
    x = 72,981,940,532.92/312,481.43
  6. Step 6: Final answer
    x = 233,556.09

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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.