To determine the nature of the product \( \frac{1}{4} \cdot 10.2568 \), we need to analyze the numbers involved.
- \( \frac{1}{4} \) is a rational number (a fraction).
- \( 10.2568 \) is also a rational number (a decimal that can be expressed as a fraction).
The product of two rational numbers is always a rational number.
Therefore, the correct choice from the provided options is:
Rational, because both numbers are rational.