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Finding the Fourth Proportional to 190.31, 262.51 and 131.31

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Solution

The fourth proportional to 190.31, 262.51 and 131.31 is: 181.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.31 : 262.51 = 131.31 : x
  2. Step 2: Convert to fraction form
    190.31/262.51 = 131.31/x
  3. Step 3: Cross multiply
    190.31x = 262.51 × 131.31
  4. Step 4: Simplify right side
    190.31x = 34,469.86
  5. Step 5: Solve for x
    x = 34,469.86/190.31
  6. Step 6: Final answer
    x = 181.13

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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.