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Finding the Fourth Proportional to 34.36, 47.38 and 29.20

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Solution

The fourth proportional to 34.36, 47.38 and 29.20 is: 40.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.36 : 47.38 = 29.20 : x
  2. Step 2: Convert to fraction form
    34.36/47.38 = 29.20/x
  3. Step 3: Cross multiply
    34.36x = 47.38 × 29.20
  4. Step 4: Simplify right side
    34.36x = 1,383.50
  5. Step 5: Solve for x
    x = 1,383.50/34.36
  6. Step 6: Final answer
    x = 40.26

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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.