Let 1 apple-unit be the smallest. Pears = 3 apples = 3 units. Oranges = twice the pears = 6 units = 258.

Apples1Pears111Oranges111111258

Plain numbers are given; italic underlined numbers are worked out.

  1. Oranges = 6 units → 258
  2. 1 unit → 258 ÷ 6 = 43 (apples)
  3. Pears = 3 units → 129
  4. Total = 43 + 129 + 258 = 430

Altogether there are 430 fruits.

Check: apples 43 + pears 129 + oranges 258 = 430. ✓