346, 680 ,1428,3141.6, ?

• I think sequence should be
  
  340, 680 ,1428,3141.6, ?
  
  then final sequence will be
  340, 680 ,1428,3141.6, 7225.68 ( i.e 3141.6 * 2.3)
  
• 12 years agoHelpfull: Yes(30) No(9)
• the series should be 340,680,1428,3141.6,?
  340*2=680
  680*2.1=1428
  1428*2.2=3141.6
  3141.6*2.3=7225.68 ans
• 11 years agoHelpfull: Yes(22) No(1)
• 346,680,1428,3141.6
  680/346=1.9~2.0,1428/680=2.1,3141.6/1428=2.2
  therefr....nex no. will be 3141.6*2.3=7225.68
• 12 years agoHelpfull: Yes(20) No(9)
• 340, 680, 1428, 3141.6, ?
  *2, *2.1, *2.2....
  Ans:
  7225.68
• 10 years agoHelpfull: Yes(1) No(0)