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Finding the Fourth Proportional to 33.90, 50.58 and 30.91

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Solution

The fourth proportional to 33.90, 50.58 and 30.91 is: 46.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.90 : 50.58 = 30.91 : x
  2. Step 2: Convert to fraction form
    33.90/50.58 = 30.91/x
  3. Step 3: Cross multiply
    33.90x = 50.58 × 30.91
  4. Step 4: Simplify right side
    33.90x = 1,563.27
  5. Step 5: Solve for x
    x = 1,563.27/33.90
  6. Step 6: Final answer
    x = 46.11

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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.