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Finding the Fourth Proportional to 29.42, 44.30 and 28.12

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Solution

The fourth proportional to 29.42, 44.30 and 28.12 is: 42.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.42 : 44.30 = 28.12 : x
  2. Step 2: Convert to fraction form
    29.42/44.30 = 28.12/x
  3. Step 3: Cross multiply
    29.42x = 44.30 × 28.12
  4. Step 4: Simplify right side
    29.42x = 1,245.72
  5. Step 5: Solve for x
    x = 1,245.72/29.42
  6. Step 6: Final answer
    x = 42.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.