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Finding the Fourth Proportional to 200.26, 276.46 and 121.59

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Solution

The fourth proportional to 200.26, 276.46 and 121.59 is: 167.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.26 : 276.46 = 121.59 : x
  2. Step 2: Convert to fraction form
    200.26/276.46 = 121.59/x
  3. Step 3: Cross multiply
    200.26x = 276.46 × 121.59
  4. Step 4: Simplify right side
    200.26x = 33,614.77
  5. Step 5: Solve for x
    x = 33,614.77/200.26
  6. Step 6: Final answer
    x = 167.86

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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.