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Finding the Fourth Proportional to 34.03, 47 and 30.39

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Solution

The fourth proportional to 34.03, 47 and 30.39 is: 41.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.03 : 47 = 30.39 : x
  2. Step 2: Convert to fraction form
    34.03/47 = 30.39/x
  3. Step 3: Cross multiply
    34.03x = 47 × 30.39
  4. Step 4: Simplify right side
    34.03x = 1,428.33
  5. Step 5: Solve for x
    x = 1,428.33/34.03
  6. Step 6: Final answer
    x = 41.97

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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.