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Finding the Fourth Proportional to 37.21, 51.34 and 30.28

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Solution

The fourth proportional to 37.21, 51.34 and 30.28 is: 41.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.21 : 51.34 = 30.28 : x
  2. Step 2: Convert to fraction form
    37.21/51.34 = 30.28/x
  3. Step 3: Cross multiply
    37.21x = 51.34 × 30.28
  4. Step 4: Simplify right side
    37.21x = 1,554.58
  5. Step 5: Solve for x
    x = 1,554.58/37.21
  6. Step 6: Final answer
    x = 41.78

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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.