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Finding the Fourth Proportional to 286.38, 427.23 and 272.70

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Solution

The fourth proportional to 286.38, 427.23 and 272.70 is: 406.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.38 : 427.23 = 272.70 : x
  2. Step 2: Convert to fraction form
    286.38/427.23 = 272.70/x
  3. Step 3: Cross multiply
    286.38x = 427.23 × 272.70
  4. Step 4: Simplify right side
    286.38x = 116,505.62
  5. Step 5: Solve for x
    x = 116,505.62/286.38
  6. Step 6: Final answer
    x = 406.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.