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Finding the Fourth Proportional to 308,794.08, 426,105.72 and 172,819.92

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Solution

The fourth proportional to 308,794.08, 426,105.72 and 172,819.92 is: 238,474.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,794.08 : 426,105.72 = 172,819.92 : x
  2. Step 2: Convert to fraction form
    308,794.08/426,105.72 = 172,819.92/x
  3. Step 3: Cross multiply
    308,794.08x = 426,105.72 × 172,819.92
  4. Step 4: Simplify right side
    308,794.08x = 73,639,556,441.94
  5. Step 5: Solve for x
    x = 73,639,556,441.94/308,794.08
  6. Step 6: Final answer
    x = 238,474.64

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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.