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Finding the Fourth Proportional to 236.21, 325.94 and 131.28

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Solution

The fourth proportional to 236.21, 325.94 and 131.28 is: 181.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.21 : 325.94 = 131.28 : x
  2. Step 2: Convert to fraction form
    236.21/325.94 = 131.28/x
  3. Step 3: Cross multiply
    236.21x = 325.94 × 131.28
  4. Step 4: Simplify right side
    236.21x = 42,789.40
  5. Step 5: Solve for x
    x = 42,789.40/236.21
  6. Step 6: Final answer
    x = 181.15

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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.