DENVER — Colorado’s largest cultural institutions are offering financial help to their colleagues, uniting big and small arts groups as they ask taxpayers to continue supporting a pioneering funding program.

The board of the Scientific and Cultural Facilities District has agreed to create a new $750,000 fund for small organizations, many formed by and serving neighborhoods and ethnic groups. The $750,000 is being raised from the core recipients of money from the organization, known as the SCFD: Denver’s main art and natural history museums, botanic gardens, performing arts center and zoo.

Since voters first approved the SCFD in 1988, it has distributed hundreds of millions of dollars in sales tax revenue to organizations in Denver and six surrounding counties. Voters will be asked in November to reauthorize SCFD.