The ratio of Andy's height to his father's height is 3 : 4. The ratio of Andy's height to his mother's height is 4 : 5. <hr>The ratio of his mother's height to his father's height is <br><input min="0" type="number" id ="imp5pg103q4a_1" class="lineinput" placeholder="?" /> : <input min="0" type="number" id ="imp5pg103q4a_2" class="lineinput" placeholder="?" />