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Finding the Fourth Proportional to 272.15, 375.54 and 161.61

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Solution

The fourth proportional to 272.15, 375.54 and 161.61 is: 223.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.15 : 375.54 = 161.61 : x
  2. Step 2: Convert to fraction form
    272.15/375.54 = 161.61/x
  3. Step 3: Cross multiply
    272.15x = 375.54 × 161.61
  4. Step 4: Simplify right side
    272.15x = 60,691.02
  5. Step 5: Solve for x
    x = 60,691.02/272.15
  6. Step 6: Final answer
    x = 223.01

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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.