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Finding the Fourth Proportional to 164.31, 225.27 and 161.38

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Solution

The fourth proportional to 164.31, 225.27 and 161.38 is: 221.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.31 : 225.27 = 161.38 : x
  2. Step 2: Convert to fraction form
    164.31/225.27 = 161.38/x
  3. Step 3: Cross multiply
    164.31x = 225.27 × 161.38
  4. Step 4: Simplify right side
    164.31x = 36,354.07
  5. Step 5: Solve for x
    x = 36,354.07/164.31
  6. Step 6: Final answer
    x = 221.26

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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.