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Finding the Fourth Proportional to 308,954.34, 426,257.91 and 172,968.30

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Solution

The fourth proportional to 308,954.34, 426,257.91 and 172,968.30 is: 238,640.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,954.34 : 426,257.91 = 172,968.30 : x
  2. Step 2: Convert to fraction form
    308,954.34/426,257.91 = 172,968.30/x
  3. Step 3: Cross multiply
    308,954.34x = 426,257.91 × 172,968.30
  4. Step 4: Simplify right side
    308,954.34x = 73,729,106,054.25
  5. Step 5: Solve for x
    x = 73,729,106,054.25/308,954.34
  6. Step 6: Final answer
    x = 238,640.78

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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.