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Finding the Fourth Proportional to 272.38, 375.89 and 155.95

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Solution

The fourth proportional to 272.38, 375.89 and 155.95 is: 215.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.38 : 375.89 = 155.95 : x
  2. Step 2: Convert to fraction form
    272.38/375.89 = 155.95/x
  3. Step 3: Cross multiply
    272.38x = 375.89 × 155.95
  4. Step 4: Simplify right side
    272.38x = 58,620.05
  5. Step 5: Solve for x
    x = 58,620.05/272.38
  6. Step 6: Final answer
    x = 215.21

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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.