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Finding the Fourth Proportional to 190.38, 262.94 and 187.81

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Solution

The fourth proportional to 190.38, 262.94 and 187.81 is: 259.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.38 : 262.94 = 187.81 : x
  2. Step 2: Convert to fraction form
    190.38/262.94 = 187.81/x
  3. Step 3: Cross multiply
    190.38x = 262.94 × 187.81
  4. Step 4: Simplify right side
    190.38x = 49,382.76
  5. Step 5: Solve for x
    x = 49,382.76/190.38
  6. Step 6: Final answer
    x = 259.39

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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.