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Finding the Fourth Proportional to 190.10, 262.11 and 155.03

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Solution

The fourth proportional to 190.10, 262.11 and 155.03 is: 213.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.10 : 262.11 = 155.03 : x
  2. Step 2: Convert to fraction form
    190.10/262.11 = 155.03/x
  3. Step 3: Cross multiply
    190.10x = 262.11 × 155.03
  4. Step 4: Simplify right side
    190.10x = 40,635.57
  5. Step 5: Solve for x
    x = 40,635.57/190.10
  6. Step 6: Final answer
    x = 213.76

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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.