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Finding the Fourth Proportional to 190.44, 285.80 and 144.81

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Solution

The fourth proportional to 190.44, 285.80 and 144.81 is: 217.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.44 : 285.80 = 144.81 : x
  2. Step 2: Convert to fraction form
    190.44/285.80 = 144.81/x
  3. Step 3: Cross multiply
    190.44x = 285.80 × 144.81
  4. Step 4: Simplify right side
    190.44x = 41,385.97
  5. Step 5: Solve for x
    x = 41,385.97/190.44
  6. Step 6: Final answer
    x = 217.32

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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.