Is their any way to backup my wordpress site in Dropbox?

Here i give some steps for it. 1. Go to your word press plugin, 2. Go to the plugin section. 3. click add new plugin. 4. Search for 'Back up Dropbox'
5. Click install so it is easy to back up your word press site.

WordPress Backup to Dropbox has been created to give you peace of mind that your blog is backed up on a regular basis.
Setup
Once installed, the authorization process is easy -

1. When you first access the plugin’s options page, it will ask you to authorize the plugin with Dropbox.
   
   
   
2. A new window will open and Dropbox will ask you to authenticate and grant the plugin access.
   
   
   
3. Finally, click continue to setup your backup.
   
   

1. PHP 5.2.16 or higher with cURL support
   
   
   
2. A Dropbox account
   
   

yes its possible you can directly back up your files to the dropbox from the wordpress.

ok thank you