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Finding the Fourth Proportional to 200.25, 276.32 and 120.48

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Solution

The fourth proportional to 200.25, 276.32 and 120.48 is: 166.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.25 : 276.32 = 120.48 : x
  2. Step 2: Convert to fraction form
    200.25/276.32 = 120.48/x
  3. Step 3: Cross multiply
    200.25x = 276.32 × 120.48
  4. Step 4: Simplify right side
    200.25x = 33,290.43
  5. Step 5: Solve for x
    x = 33,290.43/200.25
  6. Step 6: Final answer
    x = 166.24

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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.