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Finding the Fourth Proportional to 200.21, 276.21 and 126.57

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Solution

The fourth proportional to 200.21, 276.21 and 126.57 is: 174.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.21 : 276.21 = 126.57 : x
  2. Step 2: Convert to fraction form
    200.21/276.21 = 126.57/x
  3. Step 3: Cross multiply
    200.21x = 276.21 × 126.57
  4. Step 4: Simplify right side
    200.21x = 34,959.90
  5. Step 5: Solve for x
    x = 34,959.90/200.21
  6. Step 6: Final answer
    x = 174.62

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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.