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Finding the Fourth Proportional to 33.28, 49.62 and 31

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Solution

The fourth proportional to 33.28, 49.62 and 31 is: 46.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.28 : 49.62 = 31 : x
  2. Step 2: Convert to fraction form
    33.28/49.62 = 31/x
  3. Step 3: Cross multiply
    33.28x = 49.62 × 31
  4. Step 4: Simplify right side
    33.28x = 1,538.22
  5. Step 5: Solve for x
    x = 1,538.22/33.28
  6. Step 6: Final answer
    x = 46.22

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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.