To solve the given problem, we need to identify the pattern in the numbers by examining the provided figures:
Let's analyze each set of numbers:
- First Set (2, 4, 20): \(2 \times 4 \times 2.5 = 20\)
- Second Set (3, 9, 90): \(3 \times 9 \times 3.33 = 90\)
- Third Set (1, 7, ?): The numbers in the first pair seem to follow the pattern of being multiplied by another number:
- For the first set, \(2 \times 4 = 8\), and the relationship to 20 is through multiplication by 2.5.
- For the second set, \(3 \times 9 = 27\), leading to 90 via multiplication by about 3.33.
- Potential formula: \(1 \times 7 \times 7.14 = 50\)
After analyzing, the missing number that logically fits this identified pattern is 50.