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Finding the Fourth Proportional to 33.31, 46 and 28.39

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Solution

The fourth proportional to 33.31, 46 and 28.39 is: 39.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.31 : 46 = 28.39 : x
  2. Step 2: Convert to fraction form
    33.31/46 = 28.39/x
  3. Step 3: Cross multiply
    33.31x = 46 × 28.39
  4. Step 4: Simplify right side
    33.31x = 1,305.94
  5. Step 5: Solve for x
    x = 1,305.94/33.31
  6. Step 6: Final answer
    x = 39.21

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1.5x scale

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.