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Finding the Fourth Proportional to 38.22, 56.96 and 34.62

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Solution

The fourth proportional to 38.22, 56.96 and 34.62 is: 51.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.22 : 56.96 = 34.62 : x
  2. Step 2: Convert to fraction form
    38.22/56.96 = 34.62/x
  3. Step 3: Cross multiply
    38.22x = 56.96 × 34.62
  4. Step 4: Simplify right side
    38.22x = 1,971.78
  5. Step 5: Solve for x
    x = 1,971.78/38.22
  6. Step 6: Final answer
    x = 51.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.