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Finding the Fourth Proportional to 190.49, 263.18 and 161.33

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Solution

The fourth proportional to 190.49, 263.18 and 161.33 is: 222.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.49 : 263.18 = 161.33 : x
  2. Step 2: Convert to fraction form
    190.49/263.18 = 161.33/x
  3. Step 3: Cross multiply
    190.49x = 263.18 × 161.33
  4. Step 4: Simplify right side
    190.49x = 42,457.92
  5. Step 5: Solve for x
    x = 42,457.92/190.49
  6. Step 6: Final answer
    x = 222.89

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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.