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Finding the Fourth Proportional to 239.66, 330.36 and 200.45

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Solution

The fourth proportional to 239.66, 330.36 and 200.45 is: 276.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.66 : 330.36 = 200.45 : x
  2. Step 2: Convert to fraction form
    239.66/330.36 = 200.45/x
  3. Step 3: Cross multiply
    239.66x = 330.36 × 200.45
  4. Step 4: Simplify right side
    239.66x = 66,221.49
  5. Step 5: Solve for x
    x = 66,221.49/239.66
  6. Step 6: Final answer
    x = 276.31

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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.