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Finding the Fourth Proportional to 200.20, 276.20 and 134.72

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Solution

The fourth proportional to 200.20, 276.20 and 134.72 is: 185.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.20 : 276.20 = 134.72 : x
  2. Step 2: Convert to fraction form
    200.20/276.20 = 134.72/x
  3. Step 3: Cross multiply
    200.20x = 276.20 × 134.72
  4. Step 4: Simplify right side
    200.20x = 37,209.66
  5. Step 5: Solve for x
    x = 37,209.66/200.20
  6. Step 6: Final answer
    x = 185.86

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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.