Question

To determine which ratio is equivalent to 978, we should simplify or convert each of the provided options into a numerical form to see which one equals 978.

1. **326**: This is simply 326, which is not equal to 978.

2. **Start Fraction 3 over 26 End Fraction**:
\[
\frac{3}{26} = 0.115384615 \quad \text{(approximately)}
\]

3. **18 Start Fraction 1 over 8 End Fraction**:
\[
18 \cdot \frac{1}{8} = \frac{18}{8} = 2.25
\]

4. **13 Start Fraction 1 over 3 End Fraction**:
\[
13 \cdot \frac{1}{3} = \frac{13}{3} \approx 4.33333333
\]

5. **318 Start Fraction 3 over 18 End Fraction**:
\[
318 \cdot \frac{3}{18} = 318 \cdot \frac{1}{6} = \frac{318}{6} = 53
\]

None of the options directly equals 978, so let's resolve which ones can be processed further:

Now let's check for equivalent ratios to see if we can express 978 in a similar format:

Since the numbers aren't yielding any results close to 978, it appears that there's confusion since none of these options are equivalent to 978.

Please verify if there is a specific reference limit or further elaboration about how you would like to define equivalence in this situation.