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Finding the Fourth Proportional to 272.21, 375.58 and 161.66

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Solution

The fourth proportional to 272.21, 375.58 and 161.66 is: 223.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.21 : 375.58 = 161.66 : x
  2. Step 2: Convert to fraction form
    272.21/375.58 = 161.66/x
  3. Step 3: Cross multiply
    272.21x = 375.58 × 161.66
  4. Step 4: Simplify right side
    272.21x = 60,716.26
  5. Step 5: Solve for x
    x = 60,716.26/272.21
  6. Step 6: Final answer
    x = 223.05

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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.