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Finding the Fourth Proportional to 33.50, 46.23 and 31.70

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Solution

The fourth proportional to 33.50, 46.23 and 31.70 is: 43.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.50 : 46.23 = 31.70 : x
  2. Step 2: Convert to fraction form
    33.50/46.23 = 31.70/x
  3. Step 3: Cross multiply
    33.50x = 46.23 × 31.70
  4. Step 4: Simplify right side
    33.50x = 1,465.49
  5. Step 5: Solve for x
    x = 1,465.49/33.50
  6. Step 6: Final answer
    x = 43.75

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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.