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Finding the Fourth Proportional to 38.31, 52.75 and 30.08

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Solution

The fourth proportional to 38.31, 52.75 and 30.08 is: 41.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.31 : 52.75 = 30.08 : x
  2. Step 2: Convert to fraction form
    38.31/52.75 = 30.08/x
  3. Step 3: Cross multiply
    38.31x = 52.75 × 30.08
  4. Step 4: Simplify right side
    38.31x = 1,586.38
  5. Step 5: Solve for x
    x = 1,586.38/38.31
  6. Step 6: Final answer
    x = 41.41

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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.