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Finding the Fourth Proportional to 190.56, 263.04 and 138.88

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Solution

The fourth proportional to 190.56, 263.04 and 138.88 is: 191.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.56 : 263.04 = 138.88 : x
  2. Step 2: Convert to fraction form
    190.56/263.04 = 138.88/x
  3. Step 3: Cross multiply
    190.56x = 263.04 × 138.88
  4. Step 4: Simplify right side
    190.56x = 36,531.00
  5. Step 5: Solve for x
    x = 36,531.00/190.56
  6. Step 6: Final answer
    x = 191.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.