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Finding the Fourth Proportional to 190.18, 261.66 and 168.31

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Solution

The fourth proportional to 190.18, 261.66 and 168.31 is: 231.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.18 : 261.66 = 168.31 : x
  2. Step 2: Convert to fraction form
    190.18/261.66 = 168.31/x
  3. Step 3: Cross multiply
    190.18x = 261.66 × 168.31
  4. Step 4: Simplify right side
    190.18x = 44,039.99
  5. Step 5: Solve for x
    x = 44,039.99/190.18
  6. Step 6: Final answer
    x = 231.57

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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.