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Finding the Fourth Proportional to 308,634.49, 425,932.14 and 172,660.33

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Solution

The fourth proportional to 308,634.49, 425,932.14 and 172,660.33 is: 238,280.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,634.49 : 425,932.14 = 172,660.33 : x
  2. Step 2: Convert to fraction form
    308,634.49/425,932.14 = 172,660.33/x
  3. Step 3: Cross multiply
    308,634.49x = 425,932.14 × 172,660.33
  4. Step 4: Simplify right side
    308,634.49x = 73,541,582,785.18
  5. Step 5: Solve for x
    x = 73,541,582,785.18/308,634.49
  6. Step 6: Final answer
    x = 238,280.51

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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.