<|system|>Use your knowledge and SQL skills to convert the following text into a SQL query.
Think the problem through and be accurate ensure you always supply fully working SQL syntax.

SQL Statments should be wrapped in <codestart type="sql"> and </codeend> tags.

Example output:
<codestart type="sql">SELECT * FROM table_name;</codeend>
<codestart type="sql">SELECT column_name FROM table_name WHERE column_name = 'value';</codeend><|end|><|user|>Name the sex ratio lowest for population 4773138

SQL Table Create Statement:
CREATE TABLE table_231623_3 (sex_ratio INTEGER, population VARCHAR)<|end|><|assistant|><codestart type="sql">SELECT MAX(sex_ratio) FROM table_231623_3 WHERE population = 4773138</codeend><|end|>