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Finding the Fourth Proportional to 200.44, 276.68 and 138.48

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Solution

The fourth proportional to 200.44, 276.68 and 138.48 is: 191.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.44 : 276.68 = 138.48 : x
  2. Step 2: Convert to fraction form
    200.44/276.68 = 138.48/x
  3. Step 3: Cross multiply
    200.44x = 276.68 × 138.48
  4. Step 4: Simplify right side
    200.44x = 38,313.96
  5. Step 5: Solve for x
    x = 38,313.96/200.44
  6. Step 6: Final answer
    x = 191.15

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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.