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Finding the Fourth Proportional to 29.28, 43.96 and 28.90

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Solution

The fourth proportional to 29.28, 43.96 and 28.90 is: 43.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.28 : 43.96 = 28.90 : x
  2. Step 2: Convert to fraction form
    29.28/43.96 = 28.90/x
  3. Step 3: Cross multiply
    29.28x = 43.96 × 28.90
  4. Step 4: Simplify right side
    29.28x = 1,270.44
  5. Step 5: Solve for x
    x = 1,270.44/29.28
  6. Step 6: Final answer
    x = 43.39

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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.