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Finding the Fourth Proportional to 274.49, 378.91 and 163.94

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Solution

The fourth proportional to 274.49, 378.91 and 163.94 is: 226.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.49 : 378.91 = 163.94 : x
  2. Step 2: Convert to fraction form
    274.49/378.91 = 163.94/x
  3. Step 3: Cross multiply
    274.49x = 378.91 × 163.94
  4. Step 4: Simplify right side
    274.49x = 62,118.51
  5. Step 5: Solve for x
    x = 62,118.51/274.49
  6. Step 6: Final answer
    x = 226.31

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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.