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Finding the Fourth Proportional to 402.82, 603.42 and 248.28

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Solution

The fourth proportional to 402.82, 603.42 and 248.28 is: 371.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.82 : 603.42 = 248.28 : x
  2. Step 2: Convert to fraction form
    402.82/603.42 = 248.28/x
  3. Step 3: Cross multiply
    402.82x = 603.42 × 248.28
  4. Step 4: Simplify right side
    402.82x = 149,817.12
  5. Step 5: Solve for x
    x = 149,817.12/402.82
  6. Step 6: Final answer
    x = 371.92

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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.