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Finding the Fourth Proportional to 28.98, 43.58 and 28.22

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Solution

The fourth proportional to 28.98, 43.58 and 28.22 is: 42.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.98 : 43.58 = 28.22 : x
  2. Step 2: Convert to fraction form
    28.98/43.58 = 28.22/x
  3. Step 3: Cross multiply
    28.98x = 43.58 × 28.22
  4. Step 4: Simplify right side
    28.98x = 1,229.47
  5. Step 5: Solve for x
    x = 1,229.47/28.98
  6. Step 6: Final answer
    x = 42.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.