![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
Both measurements need to have the same unit of measure.
\Span of the bridge was 50 feet. Convert these 50 feet into inches.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3e07865129655fb62fc596a53c883209.png\")
inches (Convert feet to inches)
Write the proportion for span of the bridge and span of the model.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5dc16529b819ef04044639607d473e30.png\")
(Write the proportion and simplify)
The scale factor is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=524d7dd267a95dfa6495d0c49b0a83f6.png\")
.![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
Suki use ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=524d7dd267a95dfa6495d0c49b0a83f6.png\")
scale factor to built her model.