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Finding the Fourth Proportional to 190.95, 286.34 and 109.95

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Solution

The fourth proportional to 190.95, 286.34 and 109.95 is: 164.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.95 : 286.34 = 109.95 : x
  2. Step 2: Convert to fraction form
    190.95/286.34 = 109.95/x
  3. Step 3: Cross multiply
    190.95x = 286.34 × 109.95
  4. Step 4: Simplify right side
    190.95x = 31,483.08
  5. Step 5: Solve for x
    x = 31,483.08/190.95
  6. Step 6: Final answer
    x = 164.88

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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.