$$\frac{4}{7}=\frac{x}{3}$$
$x = \frac{12}{7} = 1\frac{5}{7} \approx 1.714285714$
$$\frac{4}{7}\times 3=x$$
$$\frac{4\times 3}{7}=x$$
$$\frac{12}{7}=x$$
$$x=\frac{12}{7}$$
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