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Finding the Fourth Proportional to 193.81, 290.31 and 161.23

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Solution

The fourth proportional to 193.81, 290.31 and 161.23 is: 241.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    193.81 : 290.31 = 161.23 : x
  2. Step 2: Convert to fraction form
    193.81/290.31 = 161.23/x
  3. Step 3: Cross multiply
    193.81x = 290.31 × 161.23
  4. Step 4: Simplify right side
    193.81x = 46,806.68
  5. Step 5: Solve for x
    x = 46,806.68/193.81
  6. Step 6: Final answer
    x = 241.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.