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Finding the Fourth Proportional to 200.21, 276.36 and 134.90

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Solution

The fourth proportional to 200.21, 276.36 and 134.90 is: 186.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.21 : 276.36 = 134.90 : x
  2. Step 2: Convert to fraction form
    200.21/276.36 = 134.90/x
  3. Step 3: Cross multiply
    200.21x = 276.36 × 134.90
  4. Step 4: Simplify right side
    200.21x = 37,279.58
  5. Step 5: Solve for x
    x = 37,279.58/200.21
  6. Step 6: Final answer
    x = 186.21

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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.