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Finding the Fourth Proportional to 29.05, 43.45 and 20.05

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Solution

The fourth proportional to 29.05, 43.45 and 20.05 is: 29.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.05 : 43.45 = 20.05 : x
  2. Step 2: Convert to fraction form
    29.05/43.45 = 20.05/x
  3. Step 3: Cross multiply
    29.05x = 43.45 × 20.05
  4. Step 4: Simplify right side
    29.05x = 871.17
  5. Step 5: Solve for x
    x = 871.17/29.05
  6. Step 6: Final answer
    x = 29.99

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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.