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Finding the Fourth Proportional to 200.26, 300.30 and 122.20

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Solution

The fourth proportional to 200.26, 300.30 and 122.20 is: 183.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.26 : 300.30 = 122.20 : x
  2. Step 2: Convert to fraction form
    200.26/300.30 = 122.20/x
  3. Step 3: Cross multiply
    200.26x = 300.30 × 122.20
  4. Step 4: Simplify right side
    200.26x = 36,696.66
  5. Step 5: Solve for x
    x = 36,696.66/200.26
  6. Step 6: Final answer
    x = 183.25

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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.