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Finding the Fourth Proportional to 190.25, 285.38 and 76.33

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Solution

The fourth proportional to 190.25, 285.38 and 76.33 is: 114.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.25 : 285.38 = 76.33 : x
  2. Step 2: Convert to fraction form
    190.25/285.38 = 76.33/x
  3. Step 3: Cross multiply
    190.25x = 285.38 × 76.33
  4. Step 4: Simplify right side
    190.25x = 21,783.06
  5. Step 5: Solve for x
    x = 21,783.06/190.25
  6. Step 6: Final answer
    x = 114.50

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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.