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Finding the Fourth Proportional to 190.77, 286.05 and 122.25

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Solution

The fourth proportional to 190.77, 286.05 and 122.25 is: 183.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.77 : 286.05 = 122.25 : x
  2. Step 2: Convert to fraction form
    190.77/286.05 = 122.25/x
  3. Step 3: Cross multiply
    190.77x = 286.05 × 122.25
  4. Step 4: Simplify right side
    190.77x = 34,969.61
  5. Step 5: Solve for x
    x = 34,969.61/190.77
  6. Step 6: Final answer
    x = 183.31

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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.