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Finding the Fourth Proportional to 190.54, 287.64 and 189.46

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Solution

The fourth proportional to 190.54, 287.64 and 189.46 is: 286.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.54 : 287.64 = 189.46 : x
  2. Step 2: Convert to fraction form
    190.54/287.64 = 189.46/x
  3. Step 3: Cross multiply
    190.54x = 287.64 × 189.46
  4. Step 4: Simplify right side
    190.54x = 54,496.27
  5. Step 5: Solve for x
    x = 54,496.27/190.54
  6. Step 6: Final answer
    x = 286.01

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.