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Finding the Fourth Proportional to 286.29, 428.40 and 248.22

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Solution

The fourth proportional to 286.29, 428.40 and 248.22 is: 371.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.29 : 428.40 = 248.22 : x
  2. Step 2: Convert to fraction form
    286.29/428.40 = 248.22/x
  3. Step 3: Cross multiply
    286.29x = 428.40 × 248.22
  4. Step 4: Simplify right side
    286.29x = 106,337.45
  5. Step 5: Solve for x
    x = 106,337.45/286.29
  6. Step 6: Final answer
    x = 371.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.