## Elementary Technical Mathematics

Create a proportion using ratios of length : resistance. $\frac{750\ ft}{1.563\ \Omega}=\frac{x\ ft}{2.605\ \Omega}$ Set the product of the means equal to the product of the extremes and solve for the variable. $1.563\times x = 750\times2.605$ $1.563x=1953.75$ $1.563x\div1.563=1953.75\div1.563$ $x=1250$