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Finding the Fourth Proportional to 308,949.84, 426,251.70 and 172,963.80

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Solution

The fourth proportional to 308,949.84, 426,251.70 and 172,963.80 is: 238,634.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,949.84 : 426,251.70 = 172,963.80 : x
  2. Step 2: Convert to fraction form
    308,949.84/426,251.70 = 172,963.80/x
  3. Step 3: Cross multiply
    308,949.84x = 426,251.70 × 172,963.80
  4. Step 4: Simplify right side
    308,949.84x = 73,726,113,788.46
  5. Step 5: Solve for x
    x = 73,726,113,788.46/308,949.84
  6. Step 6: Final answer
    x = 238,634.58

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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.