Question

which proportion could you use to convert 7 grams to milligrams?
$\frac{1,000 \text{ milligrams}}{1 \text{ gram}}=\frac{? \text{ milligrams}}{7 \text{ grams}}$
$\frac{10 \text{ milligrams}}{1 \text{ grams}}=\frac{? \text{ milligrams}}{7 \text{ grams}}$
convert.
7 grams = milligrams

Explanation:

Step1: Recall conversion factor

We know that 1 gram = 1000 milligrams.

Step2: Set up proportion

The correct proportion is $\frac{1000\text{ milligrams}}{1\text{ gram}}=\frac{?\text{ milligrams}}{7\text{ grams}}$.

Step3: Solve for unknown

Let the unknown be $x$. Cross - multiply: $1\times x = 1000\times7$. So $x = 7000$ milligrams.

Answer:

7000