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Finding the Fourth Proportional to 190.71, 285.44 and 161.87

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Solution

The fourth proportional to 190.71, 285.44 and 161.87 is: 242.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.71 : 285.44 = 161.87 : x
  2. Step 2: Convert to fraction form
    190.71/285.44 = 161.87/x
  3. Step 3: Cross multiply
    190.71x = 285.44 × 161.87
  4. Step 4: Simplify right side
    190.71x = 46,201.94
  5. Step 5: Solve for x
    x = 46,201.94/190.71
  6. Step 6: Final answer
    x = 242.26

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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.