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Finding the Fourth Proportional to 190.56, 261.26 and 187.28

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Solution

The fourth proportional to 190.56, 261.26 and 187.28 is: 256.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.56 : 261.26 = 187.28 : x
  2. Step 2: Convert to fraction form
    190.56/261.26 = 187.28/x
  3. Step 3: Cross multiply
    190.56x = 261.26 × 187.28
  4. Step 4: Simplify right side
    190.56x = 48,928.77
  5. Step 5: Solve for x
    x = 48,928.77/190.56
  6. Step 6: Final answer
    x = 256.76

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.