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Finding the Fourth Proportional to 286.28, 427.02 and 262.69

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Solution

The fourth proportional to 286.28, 427.02 and 262.69 is: 391.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.28 : 427.02 = 262.69 : x
  2. Step 2: Convert to fraction form
    286.28/427.02 = 262.69/x
  3. Step 3: Cross multiply
    286.28x = 427.02 × 262.69
  4. Step 4: Simplify right side
    286.28x = 112,173.88
  5. Step 5: Solve for x
    x = 112,173.88/286.28
  6. Step 6: Final answer
    x = 391.83

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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.