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Finding the Fourth Proportional to 200.18, 276.30 and 122.58

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Solution

The fourth proportional to 200.18, 276.30 and 122.58 is: 169.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.18 : 276.30 = 122.58 : x
  2. Step 2: Convert to fraction form
    200.18/276.30 = 122.58/x
  3. Step 3: Cross multiply
    200.18x = 276.30 × 122.58
  4. Step 4: Simplify right side
    200.18x = 33,868.85
  5. Step 5: Solve for x
    x = 33,868.85/200.18
  6. Step 6: Final answer
    x = 169.19

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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.