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Finding the Fourth Proportional to 308,471.67, 425,687.94 and 172,504.08

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Solution

The fourth proportional to 308,471.67, 425,687.94 and 172,504.08 is: 238,053.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,471.67 : 425,687.94 = 172,504.08 : x
  2. Step 2: Convert to fraction form
    308,471.67/425,687.94 = 172,504.08/x
  3. Step 3: Cross multiply
    308,471.67x = 425,687.94 × 172,504.08
  4. Step 4: Simplify right side
    308,471.67x = 73,432,906,456.80
  5. Step 5: Solve for x
    x = 73,432,906,456.80/308,471.67
  6. Step 6: Final answer
    x = 238,053.97

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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.