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Finding the Fourth Proportional to 308,954.09, 426,344.82 and 172,975.32

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Solution

The fourth proportional to 308,954.09, 426,344.82 and 172,975.32 is: 238,699.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,954.09 : 426,344.82 = 172,975.32 : x
  2. Step 2: Convert to fraction form
    308,954.09/426,344.82 = 172,975.32/x
  3. Step 3: Cross multiply
    308,954.09x = 426,344.82 × 172,975.32
  4. Step 4: Simplify right side
    308,954.09x = 73,747,131,669.84
  5. Step 5: Solve for x
    x = 73,747,131,669.84/308,954.09
  6. Step 6: Final answer
    x = 238,699.33

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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.