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Finding the Fourth Proportional to 318.25, 439.16 and 200.28

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Solution

The fourth proportional to 318.25, 439.16 and 200.28 is: 276.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.25 : 439.16 = 200.28 : x
  2. Step 2: Convert to fraction form
    318.25/439.16 = 200.28/x
  3. Step 3: Cross multiply
    318.25x = 439.16 × 200.28
  4. Step 4: Simplify right side
    318.25x = 87,954.96
  5. Step 5: Solve for x
    x = 87,954.96/318.25
  6. Step 6: Final answer
    x = 276.38

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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.