Why Laravel gives wrong result query?

$groups = Groups::where("min", '>=', $result->Z)->where("max", '<=', $result->Z)->orderBy('min')->get();

Where $result->Z is 52.850294770880225.

So, I should get row:

4 | 47.01 | 52.99 | 0

Instead empty:

Collection {#631 ▼
  #items: []
}

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