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Finding the Fourth Proportional to 308,356.91, 425,541.92 and 172,396.59

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Solution

The fourth proportional to 308,356.91, 425,541.92 and 172,396.59 is: 237,912.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,356.91 : 425,541.92 = 172,396.59 : x
  2. Step 2: Convert to fraction form
    308,356.91/425,541.92 = 172,396.59/x
  3. Step 3: Cross multiply
    308,356.91x = 425,541.92 × 172,396.59
  4. Step 4: Simplify right side
    308,356.91x = 73,361,975,910.05
  5. Step 5: Solve for x
    x = 73,361,975,910.05/308,356.91
  6. Step 6: Final answer
    x = 237,912.54

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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.